Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria

Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria

<p>Whiteite-(CaMnFe), CaMn<span class="inline-formula"><sup>2+</sup></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dsp...

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Main Authors: R. Hochleitner, C. Rewitzer, I. E. Grey, W. G. Mumme, C. M. MacRae, A. R. Kampf, E. Keck, R. W. Gable, A. M. Glenn
Format: Article
Language:English
Published: Copernicus Publications 2023-02-01
Series:European Journal of Mineralogy
Online Access:https://ejm.copernicus.org/articles/35/95/2023/ejm-35-95-2023.pdf
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author R. Hochleitner
C. Rewitzer
I. E. Grey
W. G. Mumme
C. M. MacRae
A. R. Kampf
E. Keck
R. W. Gable
A. M. Glenn
author_facet R. Hochleitner
C. Rewitzer
I. E. Grey
W. G. Mumme
C. M. MacRae
A. R. Kampf
E. Keck
R. W. Gable
A. M. Glenn
author_sort R. Hochleitner
collection DOAJ
description <p>Whiteite-(CaMnFe), CaMn<span class="inline-formula"><sup>2+</sup></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">2</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="12pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="d4d25c079dd3abd10641323026d872bc"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-95-2023-ie00001.svg" width="12pt" height="16pt" src="ejm-35-95-2023-ie00001.png"/></svg:svg></span></span>Al<span class="inline-formula"><sub>2</sub></span>(PO<span class="inline-formula"><sub>4</sub></span>)<span class="inline-formula"><sub>4</sub></span>(OH)<span class="inline-formula"><sub>2</sub></span> <span class="inline-formula">⋅</span> 8H<span class="inline-formula"><sub>2</sub></span>O, is a new whiteite-subgroup member of the jahnsite group from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. It was found in vugs in an altered feldspar area of a specimen composed predominantly of rockbridgeite, with hureaulite and relic triphylite. Other associated minerals in small vugs in the specimen were strengite and laueite. Whiteite-(CaMnFe) occurs as sprays and clusters of colourless to pale yellow, rod-like crystals, with diameters of typically 10 to 50 <span class="inline-formula">µ</span>m and lengths up to <span class="inline-formula">∼</span> 500 <span class="inline-formula">µ</span>m. The crystals are flattened on {001} and elongated along [010]. The measured density is 2.80(2) g cm<span class="inline-formula"><sup>−3</sup></span>. Optically, whiteite-(CaMnFe) crystals are biaxial (<span class="inline-formula">+</span>), with <span class="inline-formula"><i>α</i>=1.608(3)</span>, <span class="inline-formula"><i>β</i>=1.612(3)</span>, <span class="inline-formula"><i>γ</i>=1.624(3)</span> and 2<span class="inline-formula"><i>V</i></span>(meas.) <span class="inline-formula">=</span> 59(1)<span class="inline-formula"><sup>∘</sup></span>. The empirical formula from electron microprobe analyses and structure refinement is (Ca<span class="inline-formula"><sub>0.70</sub></span>Mn<span class="inline-formula"><sub>0.30</sub></span>)Mn(Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M22" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">1.23</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="c3536c245242a69d83af5e6ae6673104"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-95-2023-ie00002.svg" width="18pt" height="17pt" src="ejm-35-95-2023-ie00002.png"/></svg:svg></span></span>Mn<span class="inline-formula"><sub>0.49</sub></span>Mg<span class="inline-formula"><sub>0.29</sub></span>Zn<span class="inline-formula"><sub>0.06</sub>)</span>(Al<span class="inline-formula"><sub>1.88</sub></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M27" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.12</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="52ae71ce42731e2fbe7ffaabbf49c6b6"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-95-2023-ie00003.svg" width="18pt" height="17pt" src="ejm-35-95-2023-ie00003.png"/></svg:svg></span></span>)(PO<span class="inline-formula"><sub>4</sub></span>)<span class="inline-formula"><sub>3.96</sub></span>(OH)<span class="inline-formula"><sub>2</sub></span>(H<span class="inline-formula"><sub>2</sub></span>O)<span class="inline-formula"><sub>8</sub></span>. Whiteite-(CaMnFe) is monoclinic, P2 <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M33" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>/</mo><mi>a</mi></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="15pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="9fa8492de05c7f0837a0c278f8848864"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-95-2023-ie00004.svg" width="15pt" height="14pt" src="ejm-35-95-2023-ie00004.png"/></svg:svg></span></span>, <span class="inline-formula"><i>a</i>=14.925(5)</span>, <span class="inline-formula"><i>b</i>=7.0100(14)</span>, <span class="inline-formula"><i>c</i>=10.053(2)</span> Å, <span class="inline-formula"><i>β</i>=111.31(2)</span><span class="inline-formula"><sup>∘</sup></span>, <span class="inline-formula"><i>V</i>=979.9(4)</span> Å<span class="inline-formula"><sup>3</sup></span> and <span class="inline-formula"><i>Z</i>=2</span>. The crystal structure was refined using single-crystal data to <span class="inline-formula"><i>w</i><i>R</i><sub>obs</sub>=0.052</span> for 1613 reflections with <span class="inline-formula"><i>I</i><i>&gt;</i>3<i>σ</i>(<i>I</i>)</span>. Site occupancy refinements confirm the ordering of dominant Ca, Mn and Fe<span class="inline-formula"><sup>2+</sup></span> in the <span class="inline-formula"><i>X</i></span>, <span class="inline-formula"><i>M</i></span>1 and <span class="inline-formula"><i>M</i></span>2 sites, respectively, of the general jahnsite-group formula <span class="inline-formula"><i>X</i><i>M</i></span>1<span class="inline-formula"><i>M</i></span>2<span class="inline-formula"><sub>2</sub></span><span class="inline-formula"><i>M</i></span>3<span class="inline-formula"><sub>2</sub></span>(H<span class="inline-formula"><sub>2</sub></span>O)<span class="inline-formula"><sub>8</sub></span>(OH)<span class="inline-formula"><sub>2</sub></span>(PO<span class="inline-formula"><sub>4</sub></span>)<span class="inline-formula"><sub>4</sub></span>.</p>
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spelling doaj.art-8911f0dce59f43abb2b6ceabe6b22f8a2023-02-14T10:11:18ZengCopernicus PublicationsEuropean Journal of Mineralogy0935-12211617-40112023-02-01359510310.5194/ejm-35-95-2023Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, BavariaR. Hochleitner0C. Rewitzer1I. E. Grey2W. G. Mumme3C. M. MacRae4A. R. Kampf5E. Keck6R. W. Gable7A. M. Glenn8Mineralogical State Collection (SNSB), Theresienstrasse 41, 80333 Munich, GermanyStadtplatz 17, 93437 Furth im Wald, GermanyCSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, AustraliaCSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, AustraliaCSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, AustraliaMineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USAAlgunderweg 3, 92694 Etzenricht, GermanySchool of Chemistry, University of Melbourne, Parkville, Victoria 3010, AustraliaCSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, Australia<p>Whiteite-(CaMnFe), CaMn<span class="inline-formula"><sup>2+</sup></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">2</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="12pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="d4d25c079dd3abd10641323026d872bc"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-95-2023-ie00001.svg" width="12pt" height="16pt" src="ejm-35-95-2023-ie00001.png"/></svg:svg></span></span>Al<span class="inline-formula"><sub>2</sub></span>(PO<span class="inline-formula"><sub>4</sub></span>)<span class="inline-formula"><sub>4</sub></span>(OH)<span class="inline-formula"><sub>2</sub></span> <span class="inline-formula">⋅</span> 8H<span class="inline-formula"><sub>2</sub></span>O, is a new whiteite-subgroup member of the jahnsite group from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. It was found in vugs in an altered feldspar area of a specimen composed predominantly of rockbridgeite, with hureaulite and relic triphylite. Other associated minerals in small vugs in the specimen were strengite and laueite. Whiteite-(CaMnFe) occurs as sprays and clusters of colourless to pale yellow, rod-like crystals, with diameters of typically 10 to 50 <span class="inline-formula">µ</span>m and lengths up to <span class="inline-formula">∼</span> 500 <span class="inline-formula">µ</span>m. The crystals are flattened on {001} and elongated along [010]. The measured density is 2.80(2) g cm<span class="inline-formula"><sup>−3</sup></span>. Optically, whiteite-(CaMnFe) crystals are biaxial (<span class="inline-formula">+</span>), with <span class="inline-formula"><i>α</i>=1.608(3)</span>, <span class="inline-formula"><i>β</i>=1.612(3)</span>, <span class="inline-formula"><i>γ</i>=1.624(3)</span> and 2<span class="inline-formula"><i>V</i></span>(meas.) <span class="inline-formula">=</span> 59(1)<span class="inline-formula"><sup>∘</sup></span>. The empirical formula from electron microprobe analyses and structure refinement is (Ca<span class="inline-formula"><sub>0.70</sub></span>Mn<span class="inline-formula"><sub>0.30</sub></span>)Mn(Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M22" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">1.23</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="c3536c245242a69d83af5e6ae6673104"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-95-2023-ie00002.svg" width="18pt" height="17pt" src="ejm-35-95-2023-ie00002.png"/></svg:svg></span></span>Mn<span class="inline-formula"><sub>0.49</sub></span>Mg<span class="inline-formula"><sub>0.29</sub></span>Zn<span class="inline-formula"><sub>0.06</sub>)</span>(Al<span class="inline-formula"><sub>1.88</sub></span>Fe<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M27" display="inline" overflow="scroll" dspmath="mathml"><mrow><msubsup><mi/><mn mathvariant="normal">0.12</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="52ae71ce42731e2fbe7ffaabbf49c6b6"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-95-2023-ie00003.svg" width="18pt" height="17pt" src="ejm-35-95-2023-ie00003.png"/></svg:svg></span></span>)(PO<span class="inline-formula"><sub>4</sub></span>)<span class="inline-formula"><sub>3.96</sub></span>(OH)<span class="inline-formula"><sub>2</sub></span>(H<span class="inline-formula"><sub>2</sub></span>O)<span class="inline-formula"><sub>8</sub></span>. Whiteite-(CaMnFe) is monoclinic, P2 <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M33" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>/</mo><mi>a</mi></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="15pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="9fa8492de05c7f0837a0c278f8848864"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-35-95-2023-ie00004.svg" width="15pt" height="14pt" src="ejm-35-95-2023-ie00004.png"/></svg:svg></span></span>, <span class="inline-formula"><i>a</i>=14.925(5)</span>, <span class="inline-formula"><i>b</i>=7.0100(14)</span>, <span class="inline-formula"><i>c</i>=10.053(2)</span> Å, <span class="inline-formula"><i>β</i>=111.31(2)</span><span class="inline-formula"><sup>∘</sup></span>, <span class="inline-formula"><i>V</i>=979.9(4)</span> Å<span class="inline-formula"><sup>3</sup></span> and <span class="inline-formula"><i>Z</i>=2</span>. The crystal structure was refined using single-crystal data to <span class="inline-formula"><i>w</i><i>R</i><sub>obs</sub>=0.052</span> for 1613 reflections with <span class="inline-formula"><i>I</i><i>&gt;</i>3<i>σ</i>(<i>I</i>)</span>. Site occupancy refinements confirm the ordering of dominant Ca, Mn and Fe<span class="inline-formula"><sup>2+</sup></span> in the <span class="inline-formula"><i>X</i></span>, <span class="inline-formula"><i>M</i></span>1 and <span class="inline-formula"><i>M</i></span>2 sites, respectively, of the general jahnsite-group formula <span class="inline-formula"><i>X</i><i>M</i></span>1<span class="inline-formula"><i>M</i></span>2<span class="inline-formula"><sub>2</sub></span><span class="inline-formula"><i>M</i></span>3<span class="inline-formula"><sub>2</sub></span>(H<span class="inline-formula"><sub>2</sub></span>O)<span class="inline-formula"><sub>8</sub></span>(OH)<span class="inline-formula"><sub>2</sub></span>(PO<span class="inline-formula"><sub>4</sub></span>)<span class="inline-formula"><sub>4</sub></span>.</p>https://ejm.copernicus.org/articles/35/95/2023/ejm-35-95-2023.pdf
spellingShingle R. Hochleitner
C. Rewitzer
I. E. Grey
W. G. Mumme
C. M. MacRae
A. R. Kampf
E. Keck
R. W. Gable
A. M. Glenn
Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria
European Journal of Mineralogy
title Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria
title_full Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria
title_fullStr Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria
title_full_unstemmed Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria
title_short Whiteite-(CaMnFe), a new jahnsite-group mineral from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria
title_sort whiteite camnfe a new jahnsite group mineral from the hagendorf sud pegmatite oberpfalz bavaria
url https://ejm.copernicus.org/articles/35/95/2023/ejm-35-95-2023.pdf
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AT wgmumme whiteitecamnfeanewjahnsitegroupmineralfromthehagendorfsudpegmatiteoberpfalzbavaria
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