Dutrowite, Na(Fe<sup>2+</sup><sub>2.5</sub>Ti<sub>0.5</sub>)Al<sub>6</sub>(Si<sub>6</sub>O<sub>18</sub>)(BO<sub>3</sub>)<sub>3</sub>(OH)<sub>3</sub>O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituent
<p>The new tourmaline supergroup mineral dutrowite, Na(Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M9" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup>...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2023-02-01
|
| Series: | European Journal of Mineralogy |
| Online Access: | https://ejm.copernicus.org/articles/35/81/2023/ejm-35-81-2023.pdf |
| _version_ | 1828036998274744320 |
|---|---|
| author | C. Biagioni F. Bosi D. Mauro D. Mauro H. Skogby A. Dini F. Zaccarini |
| author_facet | C. Biagioni F. Bosi D. Mauro D. Mauro H. Skogby A. Dini F. Zaccarini |
| author_sort | C. Biagioni |
| collection | DOAJ |
| description | <p>The new tourmaline supergroup mineral dutrowite,
Na(Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M9" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">2.5</mn><mrow><mn mathvariant="normal">2</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="13pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="6a8167e1d78a8502620c462a35bb5c1a"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00003.svg" width="13pt" height="17pt" src="ejm-35-81-2023-ie00003.png"/></svg:svg></span></span>Ti<span class="inline-formula"><sub>0.5</sub></span>)Al<span class="inline-formula"><sub>6</sub></span>(Si<span class="inline-formula"><sub>6</sub></span>O<span class="inline-formula"><sub>18</sub></span>)(BO<span class="inline-formula"><sub>3</sub></span>)<span class="inline-formula"><sub>3</sub></span>(OH)<span class="inline-formula"><sub>3</sub></span>O,
has been discovered in an outcrop of a Permian metarhyolite near the hamlet
of Fornovolasco, Apuan Alps, Tuscany, Italy. It occurs as chemically
homogeneous domains, up to 0.5 mm, brown in colour, with a light-brown streak
and a vitreous lustre, within anhedral to subhedral prismatic crystals, up
to 1 mm in size, closely associated with Fe-rich oxy-dravite. Dutrowite is
trigonal, space group <span class="inline-formula"><i>R</i></span>3<span class="inline-formula"><i>m</i></span>, with <span class="inline-formula"><i>a</i>=15.9864(8)</span>, <span class="inline-formula"><i>c</i>=7.2187(4)</span> Å, <span class="inline-formula"><i>V</i>=1597.68(18)</span> Å<span class="inline-formula"><sup>3</sup></span>, and <span class="inline-formula"><i>Z</i>=3</span>. The crystal structure was refined to
<span class="inline-formula"><i>R</i><sub>1</sub>=0.0257</span> for 1095 unique reflections with <span class="inline-formula"><i>F</i><sub><i>o</i></sub>>4<i>σ</i></span> (<span class="inline-formula"><i>F</i><sub><i>o</i></sub></span>) and 94 refined parameters. Electron microprobe analysis,
coupled with Mössbauer spectroscopy, resulted in the empirical
structural formula <span class="inline-formula"><sup><i>X</i></sup></span>(Na<span class="inline-formula"><sub>0.81</sub></span>Ca<span class="inline-formula"><sub>0.20</sub></span>K<span class="inline-formula"><sub>0.01</sub></span>)<span class="inline-formula"><sub>Σ1.02</sub></span> <span class="inline-formula"><sup><i>Y</i></sup></span>(Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M33" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">1.25</mn><mrow><mn mathvariant="normal">2</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="d74198d558a33755e55a33581ac7594b"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00004.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00004.png"/></svg:svg></span></span>Mg<span class="inline-formula"><sub>0.76</sub></span>Ti<span class="inline-formula"><sub>0.56</sub></span>Al<span class="inline-formula"><sub>0.42</sub></span>)<span class="inline-formula"><sub>Σ3.00</sub></span> <span class="inline-formula"><sup><i>Z</i></sup></span>(Al<span class="inline-formula"><sub>4.71</sub></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M40" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.27</mn><mrow><mn mathvariant="normal">3</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="67f65a36a08ae2d68ca83715d7b23817"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00005.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00005.png"/></svg:svg></span></span>V<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M41" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.02</mn><mrow><mn mathvariant="normal">3</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="6f1d79fc7ae279a8e2a716c65dac76c2"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00006.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00006.png"/></svg:svg></span></span>Mg<span class="inline-formula"><sub>0.82</sub></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M43" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.18</mn><mrow><mn mathvariant="normal">2</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="325cb693a0f52c16c09f1cd2ccbe65c3"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00007.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00007.png"/></svg:svg></span></span>)<span class="inline-formula"><sub>Σ6.00</sub></span> <span class="inline-formula"><sup><i>T</i></sup></span>[(Si<span class="inline-formula"><sub>5.82</sub></span>Al<span class="inline-formula"><sub>0.18</sub></span>)<span class="inline-formula"><sub>Σ6.00</sub></span>O<span class="inline-formula"><sub>18</sub></span>]
(BO<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M50" display="inline" overflow="scroll" dspmath="mathml"><mrow><msub><mi/><mn mathvariant="normal">3</mn></msub><msubsup><mo>)</mo><mn mathvariant="normal">3</mn><mrow><mi mathvariant="normal">O</mi><mo>(</mo><mn mathvariant="normal">3</mn><mo>)</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="27pt" height="18pt" class="svg-formula" dspmath="mathimg" md5hash="e57b9d6e546a8e37da530423cc2f1384"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00008.svg" width="27pt" height="18pt" src="ejm-35-81-2023-ie00008.png"/></svg:svg></span></span>(OH)<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M51" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">3</mn><mrow><mi mathvariant="normal">O</mi><mo>(</mo><mn mathvariant="normal">1</mn><mo>)</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="18pt" class="svg-formula" dspmath="mathimg" md5hash="1fddf79d9ea518687ce38e53f8cffa37"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00009.svg" width="18pt" height="18pt" src="ejm-35-81-2023-ie00009.png"/></svg:svg></span></span>[O<span class="inline-formula"><sub>0.59</sub></span>(OH)<span class="inline-formula"><sub>0.41</sub></span>]<span class="inline-formula"><sub>Σ1.00</sub></span>, which was recast in the
empirical ordered formula, required for classification purposes:
<span class="inline-formula"><sup><i>X</i></sup></span>(Na<span class="inline-formula"><sub>0.81</sub></span>Ca<span class="inline-formula"><sub>0.20</sub></span>K<span class="inline-formula"><sub>0.01</sub></span>)<span class="inline-formula"><sub>Σ1.02</sub></span> <span class="inline-formula"><sup><i>Y</i></sup></span>(Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M61" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">1.43</mn><mrow><mn mathvariant="normal">2</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="69ab4f63245877ed82f4a1cd76757ae3"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00010.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00010.png"/></svg:svg></span></span>Mg<span class="inline-formula"><sub>1.00</sub></span>Ti<span class="inline-formula"><sub>0.56</sub></span>)<span class="inline-formula"><sub>Σ3.00</sub></span> <span class="inline-formula"><sup><i>Z</i></sup></span>(Al<span class="inline-formula"><sub>5.13</sub></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M67" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.27</mn><mrow><mn mathvariant="normal">3</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="b40639bc955e6d5f1ec9652615c8f64c"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00011.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00011.png"/></svg:svg></span></span>V<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M68" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.02</mn><mrow><mn mathvariant="normal">3</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="0799fff967e588b08f97a81a63f9d74b"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00012.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00012.png"/></svg:svg></span></span>Mg<span class="inline-formula"><sub>0.58</sub></span>)<span class="inline-formula"><sub>Σ6.00</sub></span> <span class="inline-formula"><sup><i>T</i></sup></span>[(Si<span class="inline-formula"><sub>5.82</sub></span>Al<span class="inline-formula"><sub>0.18</sub></span>)<span class="inline-formula"><sub>Σ6.00</sub></span>O<span class="inline-formula"><sub>18</sub></span>]
(BO<span class="inline-formula"><sub>3</sub></span>)<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M77" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">3</mn><mi>V</mi></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="7pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="f05be9fd583d3c630b40f0b404220928"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00013.svg" width="7pt" height="17pt" src="ejm-35-81-2023-ie00013.png"/></svg:svg></span></span>(OH)<span class="inline-formula"><sub>3</sub></span> <span class="inline-formula"><sup><i>W</i></sup></span>[O<span class="inline-formula"><sub>0.59</sub></span>(OH)<span class="inline-formula"><sub>0.41</sub></span>]<span class="inline-formula"><sub>Σ1.00</sub></span>. Dutrowite is an
oxy-species belonging to the alkali group of the tourmaline supergroup.
Titanium is hosted in octahedral coordination, and its incorporation is
probably due to the substitution 2Al<span class="inline-formula"><sup>3+</sup></span> <span class="inline-formula">=</span> Ti<span class="inline-formula"><sup>4+</sup></span> <span class="inline-formula">+</span> (Fe,Mg)<span class="inline-formula"><sup>2+</sup></span>. Its occurrence seems to be related to late-stage
high-T/low-P replacement of “biotite” during the
late-magmatic/hydrothermal evolution of the Permian metarhyolite.</p> |
| first_indexed | 2024-04-10T16:05:23Z |
| format | Article |
| id | doaj.art-f06246e1d1234e96b85a31cb4f47d3cb |
| institution | Directory Open Access Journal |
| issn | 0935-1221 1617-4011 |
| language | English |
| last_indexed | 2024-04-10T16:05:23Z |
| publishDate | 2023-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | European Journal of Mineralogy |
| spelling | doaj.art-f06246e1d1234e96b85a31cb4f47d3cb2023-02-10T06:20:10ZengCopernicus PublicationsEuropean Journal of Mineralogy0935-12211617-40112023-02-0135819410.5194/ejm-35-81-2023Dutrowite, Na(Fe<sup>2+</sup><sub>2.5</sub>Ti<sub>0.5</sub>)Al<sub>6</sub>(Si<sub>6</sub>O<sub>18</sub>)(BO<sub>3</sub>)<sub>3</sub>(OH)<sub>3</sub>O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituentC. Biagioni0F. Bosi1D. Mauro2D. Mauro3H. Skogby4A. Dini5F. Zaccarini6Dipartimento di Scienze della Terra, Università di Pisa, Via Santa Maria 53, 56126 Pisa, ItalyDipartimento di Scienze della Terra, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, ItalyDipartimento di Scienze della Terra, Università di Pisa, Via Santa Maria 53, 56126 Pisa, ItalyMuseo di Storia Naturale, Università di Pisa, Via Roma 79, 56011 Calci, ItalyDepartment of Geosciences, Swedish Museum of Natural History, P.O. Box 50007, 10405 Stockholm, SwedenIstituto di Geoscienze e Georisorse, CNR-Pisa, Via Moruzzi 1, 56124 Pisa, ItalyDepartment of Applied Geological Sciences and Geophysics, University of Leoben, Peter Tunner Str. 5, 8700 Leoben, Austria<p>The new tourmaline supergroup mineral dutrowite, Na(Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M9" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">2.5</mn><mrow><mn mathvariant="normal">2</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="13pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="6a8167e1d78a8502620c462a35bb5c1a"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00003.svg" width="13pt" height="17pt" src="ejm-35-81-2023-ie00003.png"/></svg:svg></span></span>Ti<span class="inline-formula"><sub>0.5</sub></span>)Al<span class="inline-formula"><sub>6</sub></span>(Si<span class="inline-formula"><sub>6</sub></span>O<span class="inline-formula"><sub>18</sub></span>)(BO<span class="inline-formula"><sub>3</sub></span>)<span class="inline-formula"><sub>3</sub></span>(OH)<span class="inline-formula"><sub>3</sub></span>O, has been discovered in an outcrop of a Permian metarhyolite near the hamlet of Fornovolasco, Apuan Alps, Tuscany, Italy. It occurs as chemically homogeneous domains, up to 0.5 mm, brown in colour, with a light-brown streak and a vitreous lustre, within anhedral to subhedral prismatic crystals, up to 1 mm in size, closely associated with Fe-rich oxy-dravite. Dutrowite is trigonal, space group <span class="inline-formula"><i>R</i></span>3<span class="inline-formula"><i>m</i></span>, with <span class="inline-formula"><i>a</i>=15.9864(8)</span>, <span class="inline-formula"><i>c</i>=7.2187(4)</span> Å, <span class="inline-formula"><i>V</i>=1597.68(18)</span> Å<span class="inline-formula"><sup>3</sup></span>, and <span class="inline-formula"><i>Z</i>=3</span>. The crystal structure was refined to <span class="inline-formula"><i>R</i><sub>1</sub>=0.0257</span> for 1095 unique reflections with <span class="inline-formula"><i>F</i><sub><i>o</i></sub>>4<i>σ</i></span> (<span class="inline-formula"><i>F</i><sub><i>o</i></sub></span>) and 94 refined parameters. Electron microprobe analysis, coupled with Mössbauer spectroscopy, resulted in the empirical structural formula <span class="inline-formula"><sup><i>X</i></sup></span>(Na<span class="inline-formula"><sub>0.81</sub></span>Ca<span class="inline-formula"><sub>0.20</sub></span>K<span class="inline-formula"><sub>0.01</sub></span>)<span class="inline-formula"><sub>Σ1.02</sub></span> <span class="inline-formula"><sup><i>Y</i></sup></span>(Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M33" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">1.25</mn><mrow><mn mathvariant="normal">2</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="d74198d558a33755e55a33581ac7594b"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00004.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00004.png"/></svg:svg></span></span>Mg<span class="inline-formula"><sub>0.76</sub></span>Ti<span class="inline-formula"><sub>0.56</sub></span>Al<span class="inline-formula"><sub>0.42</sub></span>)<span class="inline-formula"><sub>Σ3.00</sub></span> <span class="inline-formula"><sup><i>Z</i></sup></span>(Al<span class="inline-formula"><sub>4.71</sub></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M40" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.27</mn><mrow><mn mathvariant="normal">3</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="67f65a36a08ae2d68ca83715d7b23817"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00005.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00005.png"/></svg:svg></span></span>V<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M41" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.02</mn><mrow><mn mathvariant="normal">3</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="6f1d79fc7ae279a8e2a716c65dac76c2"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00006.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00006.png"/></svg:svg></span></span>Mg<span class="inline-formula"><sub>0.82</sub></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M43" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.18</mn><mrow><mn mathvariant="normal">2</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="325cb693a0f52c16c09f1cd2ccbe65c3"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00007.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00007.png"/></svg:svg></span></span>)<span class="inline-formula"><sub>Σ6.00</sub></span> <span class="inline-formula"><sup><i>T</i></sup></span>[(Si<span class="inline-formula"><sub>5.82</sub></span>Al<span class="inline-formula"><sub>0.18</sub></span>)<span class="inline-formula"><sub>Σ6.00</sub></span>O<span class="inline-formula"><sub>18</sub></span>] (BO<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M50" display="inline" overflow="scroll" dspmath="mathml"><mrow><msub><mi/><mn mathvariant="normal">3</mn></msub><msubsup><mo>)</mo><mn mathvariant="normal">3</mn><mrow><mi mathvariant="normal">O</mi><mo>(</mo><mn mathvariant="normal">3</mn><mo>)</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="27pt" height="18pt" class="svg-formula" dspmath="mathimg" md5hash="e57b9d6e546a8e37da530423cc2f1384"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00008.svg" width="27pt" height="18pt" src="ejm-35-81-2023-ie00008.png"/></svg:svg></span></span>(OH)<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M51" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">3</mn><mrow><mi mathvariant="normal">O</mi><mo>(</mo><mn mathvariant="normal">1</mn><mo>)</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="18pt" class="svg-formula" dspmath="mathimg" md5hash="1fddf79d9ea518687ce38e53f8cffa37"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00009.svg" width="18pt" height="18pt" src="ejm-35-81-2023-ie00009.png"/></svg:svg></span></span>[O<span class="inline-formula"><sub>0.59</sub></span>(OH)<span class="inline-formula"><sub>0.41</sub></span>]<span class="inline-formula"><sub>Σ1.00</sub></span>, which was recast in the empirical ordered formula, required for classification purposes: <span class="inline-formula"><sup><i>X</i></sup></span>(Na<span class="inline-formula"><sub>0.81</sub></span>Ca<span class="inline-formula"><sub>0.20</sub></span>K<span class="inline-formula"><sub>0.01</sub></span>)<span class="inline-formula"><sub>Σ1.02</sub></span> <span class="inline-formula"><sup><i>Y</i></sup></span>(Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M61" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">1.43</mn><mrow><mn mathvariant="normal">2</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="69ab4f63245877ed82f4a1cd76757ae3"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00010.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00010.png"/></svg:svg></span></span>Mg<span class="inline-formula"><sub>1.00</sub></span>Ti<span class="inline-formula"><sub>0.56</sub></span>)<span class="inline-formula"><sub>Σ3.00</sub></span> <span class="inline-formula"><sup><i>Z</i></sup></span>(Al<span class="inline-formula"><sub>5.13</sub></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M67" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.27</mn><mrow><mn mathvariant="normal">3</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="b40639bc955e6d5f1ec9652615c8f64c"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00011.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00011.png"/></svg:svg></span></span>V<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M68" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.02</mn><mrow><mn mathvariant="normal">3</mn><mo>+</mo></mrow></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="18pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="0799fff967e588b08f97a81a63f9d74b"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00012.svg" width="18pt" height="17pt" src="ejm-35-81-2023-ie00012.png"/></svg:svg></span></span>Mg<span class="inline-formula"><sub>0.58</sub></span>)<span class="inline-formula"><sub>Σ6.00</sub></span> <span class="inline-formula"><sup><i>T</i></sup></span>[(Si<span class="inline-formula"><sub>5.82</sub></span>Al<span class="inline-formula"><sub>0.18</sub></span>)<span class="inline-formula"><sub>Σ6.00</sub></span>O<span class="inline-formula"><sub>18</sub></span>] (BO<span class="inline-formula"><sub>3</sub></span>)<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M77" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">3</mn><mi>V</mi></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="7pt" height="17pt" class="svg-formula" dspmath="mathimg" md5hash="f05be9fd583d3c630b40f0b404220928"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-81-2023-ie00013.svg" width="7pt" height="17pt" src="ejm-35-81-2023-ie00013.png"/></svg:svg></span></span>(OH)<span class="inline-formula"><sub>3</sub></span> <span class="inline-formula"><sup><i>W</i></sup></span>[O<span class="inline-formula"><sub>0.59</sub></span>(OH)<span class="inline-formula"><sub>0.41</sub></span>]<span class="inline-formula"><sub>Σ1.00</sub></span>. Dutrowite is an oxy-species belonging to the alkali group of the tourmaline supergroup. Titanium is hosted in octahedral coordination, and its incorporation is probably due to the substitution 2Al<span class="inline-formula"><sup>3+</sup></span> <span class="inline-formula">=</span> Ti<span class="inline-formula"><sup>4+</sup></span> <span class="inline-formula">+</span> (Fe,Mg)<span class="inline-formula"><sup>2+</sup></span>. Its occurrence seems to be related to late-stage high-T/low-P replacement of “biotite” during the late-magmatic/hydrothermal evolution of the Permian metarhyolite.</p>https://ejm.copernicus.org/articles/35/81/2023/ejm-35-81-2023.pdf |
| spellingShingle | C. Biagioni F. Bosi D. Mauro D. Mauro H. Skogby A. Dini F. Zaccarini Dutrowite, Na(Fe<sup>2+</sup><sub>2.5</sub>Ti<sub>0.5</sub>)Al<sub>6</sub>(Si<sub>6</sub>O<sub>18</sub>)(BO<sub>3</sub>)<sub>3</sub>(OH)<sub>3</sub>O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituent European Journal of Mineralogy |
| title | Dutrowite, Na(Fe<sup>2+</sup><sub>2.5</sub>Ti<sub>0.5</sub>)Al<sub>6</sub>(Si<sub>6</sub>O<sub>18</sub>)(BO<sub>3</sub>)<sub>3</sub>(OH)<sub>3</sub>O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituent |
| title_full | Dutrowite, Na(Fe<sup>2+</sup><sub>2.5</sub>Ti<sub>0.5</sub>)Al<sub>6</sub>(Si<sub>6</sub>O<sub>18</sub>)(BO<sub>3</sub>)<sub>3</sub>(OH)<sub>3</sub>O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituent |
| title_fullStr | Dutrowite, Na(Fe<sup>2+</sup><sub>2.5</sub>Ti<sub>0.5</sub>)Al<sub>6</sub>(Si<sub>6</sub>O<sub>18</sub>)(BO<sub>3</sub>)<sub>3</sub>(OH)<sub>3</sub>O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituent |
| title_full_unstemmed | Dutrowite, Na(Fe<sup>2+</sup><sub>2.5</sub>Ti<sub>0.5</sub>)Al<sub>6</sub>(Si<sub>6</sub>O<sub>18</sub>)(BO<sub>3</sub>)<sub>3</sub>(OH)<sub>3</sub>O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituent |
| title_short | Dutrowite, Na(Fe<sup>2+</sup><sub>2.5</sub>Ti<sub>0.5</sub>)Al<sub>6</sub>(Si<sub>6</sub>O<sub>18</sub>)(BO<sub>3</sub>)<sub>3</sub>(OH)<sub>3</sub>O, a new mineral from the Apuan Alps (Tuscany, Italy): the first member of the tourmaline supergroup with Ti as a species-forming chemical constituent |
| title_sort | dutrowite na fe sup 2 sup sub 2 5 sub ti sub 0 5 sub al sub 6 sub si sub 6 sub o sub 18 sub bo sub 3 sub sub 3 sub oh sub 3 sub o a new mineral from the apuan alps tuscany italy the first member of the tourmaline supergroup with ti as a species forming chemical constituent |
| url | https://ejm.copernicus.org/articles/35/81/2023/ejm-35-81-2023.pdf |
| work_keys_str_mv | AT cbiagioni dutrowitenafesup2supsub25subtisub05subalsub6subsisub6subosub18subbosub3subsub3subohsub3suboanewmineralfromtheapuanalpstuscanyitalythefirstmemberofthetourmalinesupergroupwithtiasaspeciesformingchemicalconstituent AT fbosi dutrowitenafesup2supsub25subtisub05subalsub6subsisub6subosub18subbosub3subsub3subohsub3suboanewmineralfromtheapuanalpstuscanyitalythefirstmemberofthetourmalinesupergroupwithtiasaspeciesformingchemicalconstituent AT dmauro dutrowitenafesup2supsub25subtisub05subalsub6subsisub6subosub18subbosub3subsub3subohsub3suboanewmineralfromtheapuanalpstuscanyitalythefirstmemberofthetourmalinesupergroupwithtiasaspeciesformingchemicalconstituent AT dmauro dutrowitenafesup2supsub25subtisub05subalsub6subsisub6subosub18subbosub3subsub3subohsub3suboanewmineralfromtheapuanalpstuscanyitalythefirstmemberofthetourmalinesupergroupwithtiasaspeciesformingchemicalconstituent AT hskogby dutrowitenafesup2supsub25subtisub05subalsub6subsisub6subosub18subbosub3subsub3subohsub3suboanewmineralfromtheapuanalpstuscanyitalythefirstmemberofthetourmalinesupergroupwithtiasaspeciesformingchemicalconstituent AT adini dutrowitenafesup2supsub25subtisub05subalsub6subsisub6subosub18subbosub3subsub3subohsub3suboanewmineralfromtheapuanalpstuscanyitalythefirstmemberofthetourmalinesupergroupwithtiasaspeciesformingchemicalconstituent AT fzaccarini dutrowitenafesup2supsub25subtisub05subalsub6subsisub6subosub18subbosub3subsub3subohsub3suboanewmineralfromtheapuanalpstuscanyitalythefirstmemberofthetourmalinesupergroupwithtiasaspeciesformingchemicalconstituent |