Kahlenbergite KAl<sub>11</sub>O<sub>17</sub>, a new <i>β</i>-alumina mineral and Fe-rich hibonite from the Hatrurim Basin, the Negev desert, Israel
<p>Kahlenbergite, ideally KAl<span class="inline-formula"><sub>11</sub></span>O<span class="inline-formula"><sub>17</sub></span>, and Fe-rich hibonite, CaAl<span class="inline-formula"><sub>10</sub>...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-07-01
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| Series: | European Journal of Mineralogy |
| Online Access: | https://ejm.copernicus.org/articles/33/341/2021/ejm-33-341-2021.pdf |
| _version_ | 1818730168374525952 |
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| author | B. Krüger E. V. Galuskin I. O. Galuskina H. Krüger Y. Vapnik |
| author_facet | B. Krüger E. V. Galuskin I. O. Galuskina H. Krüger Y. Vapnik |
| author_sort | B. Krüger |
| collection | DOAJ |
| description | <p>Kahlenbergite, ideally KAl<span class="inline-formula"><sub>11</sub></span>O<span class="inline-formula"><sub>17</sub></span>, and Fe-rich
hibonite, CaAl<span class="inline-formula"><sub>10</sub></span>Fe<span class="inline-formula"><sub>2</sub></span>O<span class="inline-formula"><sub>19</sub></span>, are high-temperature minerals found
in “olive” subunits of pyrometamorphic rocks, in the Hatrurim
Basin, the Negev desert, Israel. The crystal structures of both minerals are
refined using synchrotron radiation single-crystal diffraction data. The
structure of kahlenbergite (<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M11" display="inline" overflow="scroll" dspmath="mathml"><mrow><mi>P</mi><msub><mn mathvariant="normal">6</mn><mn mathvariant="normal">3</mn></msub><mo>/</mo><mi>m</mi><mi>m</mi><mi>c</mi></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="53pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="7b1b9eb9e06683e3971762901914ae6a"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-33-341-2021-ie00001.svg" width="53pt" height="14pt" src="ejm-33-341-2021-ie00001.png"/></svg:svg></span></span>; <span class="inline-formula"><i>a</i>=5.6486(1)</span> Å; <span class="inline-formula"><i>b</i>=22.8970(3)</span> Å; <span class="inline-formula"><i>Z</i>=2</span>) exhibits triple spinel blocks and so-called R blocks. The spinel
blocks show mixed layers with AlO<span class="inline-formula"><sub>6</sub></span> octahedra and
(Al<span class="inline-formula"><sub>0.56</sub></span>Fe<span class="inline-formula"><sub>0.44</sub>)</span>O<span class="inline-formula"><sub>4</sub></span> tetrahedra and kagome layers with
(Al<span class="inline-formula"><sub>0.92</sub></span>Fe<span class="inline-formula"><sub>0.08</sub>)</span>O<span class="inline-formula"><sub>6</sub></span> octahedra. One-dimensional diffuse
scattering observed parallel to <span class="inline-formula"><i>c</i><sup>*</sup></span> implies stacking faults in the structure.
Also, in one of the investigated kahlenbergite crystals additional
reflections can be identified, which obviously belong to a second phase with
a smaller lattice parameter <span class="inline-formula"><i>c</i></span>: Fe<span class="inline-formula"><sup>3+</sup></span>-rich hibonite. The structure of
hibonite contains the same spinel blocks as kahlenbergite. The R blocks in
hibonite contain Ca atoms, AlO<span class="inline-formula"><sub>5</sub></span> bipyramids, and AlO<span class="inline-formula"><sub>6</sub></span> octahedra,
whereas the R blocks in kahlenbergite contain potassium atoms and AlO<span class="inline-formula"><sub>4</sub></span>
tetrahedra.</p> |
| first_indexed | 2024-12-17T22:57:30Z |
| format | Article |
| id | doaj.art-c76574acb3bc4b098a1966c455b3b5c3 |
| institution | Directory Open Access Journal |
| issn | 0935-1221 1617-4011 |
| language | English |
| last_indexed | 2024-12-17T22:57:30Z |
| publishDate | 2021-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | European Journal of Mineralogy |
| spelling | doaj.art-c76574acb3bc4b098a1966c455b3b5c32022-12-21T21:29:30ZengCopernicus PublicationsEuropean Journal of Mineralogy0935-12211617-40112021-07-013334135510.5194/ejm-33-341-2021Kahlenbergite KAl<sub>11</sub>O<sub>17</sub>, a new <i>β</i>-alumina mineral and Fe-rich hibonite from the Hatrurim Basin, the Negev desert, IsraelB. Krüger0E. V. Galuskin1I. O. Galuskina2H. Krüger3Y. Vapnik4Institute of Mineralogy and Petrography, University of Innsbruck, Innrain 52, 6020 Innsbruck, AustriaFaculty of Natural Sciences, Institute of Earth Sciences, University of Silesia, Będzińska 60, 41-200 Sosnowiec, PolandInstitute of Mineralogy and Petrography, University of Innsbruck, Innrain 52, 6020 Innsbruck, AustriaInstitute of Mineralogy and Petrography, University of Innsbruck, Innrain 52, 6020 Innsbruck, AustriaDepartment of Geological and Environmental Sciences, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel<p>Kahlenbergite, ideally KAl<span class="inline-formula"><sub>11</sub></span>O<span class="inline-formula"><sub>17</sub></span>, and Fe-rich hibonite, CaAl<span class="inline-formula"><sub>10</sub></span>Fe<span class="inline-formula"><sub>2</sub></span>O<span class="inline-formula"><sub>19</sub></span>, are high-temperature minerals found in “olive” subunits of pyrometamorphic rocks, in the Hatrurim Basin, the Negev desert, Israel. The crystal structures of both minerals are refined using synchrotron radiation single-crystal diffraction data. The structure of kahlenbergite (<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M11" display="inline" overflow="scroll" dspmath="mathml"><mrow><mi>P</mi><msub><mn mathvariant="normal">6</mn><mn mathvariant="normal">3</mn></msub><mo>/</mo><mi>m</mi><mi>m</mi><mi>c</mi></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="53pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="7b1b9eb9e06683e3971762901914ae6a"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ejm-33-341-2021-ie00001.svg" width="53pt" height="14pt" src="ejm-33-341-2021-ie00001.png"/></svg:svg></span></span>; <span class="inline-formula"><i>a</i>=5.6486(1)</span> Å; <span class="inline-formula"><i>b</i>=22.8970(3)</span> Å; <span class="inline-formula"><i>Z</i>=2</span>) exhibits triple spinel blocks and so-called R blocks. The spinel blocks show mixed layers with AlO<span class="inline-formula"><sub>6</sub></span> octahedra and (Al<span class="inline-formula"><sub>0.56</sub></span>Fe<span class="inline-formula"><sub>0.44</sub>)</span>O<span class="inline-formula"><sub>4</sub></span> tetrahedra and kagome layers with (Al<span class="inline-formula"><sub>0.92</sub></span>Fe<span class="inline-formula"><sub>0.08</sub>)</span>O<span class="inline-formula"><sub>6</sub></span> octahedra. One-dimensional diffuse scattering observed parallel to <span class="inline-formula"><i>c</i><sup>*</sup></span> implies stacking faults in the structure. Also, in one of the investigated kahlenbergite crystals additional reflections can be identified, which obviously belong to a second phase with a smaller lattice parameter <span class="inline-formula"><i>c</i></span>: Fe<span class="inline-formula"><sup>3+</sup></span>-rich hibonite. The structure of hibonite contains the same spinel blocks as kahlenbergite. The R blocks in hibonite contain Ca atoms, AlO<span class="inline-formula"><sub>5</sub></span> bipyramids, and AlO<span class="inline-formula"><sub>6</sub></span> octahedra, whereas the R blocks in kahlenbergite contain potassium atoms and AlO<span class="inline-formula"><sub>4</sub></span> tetrahedra.</p>https://ejm.copernicus.org/articles/33/341/2021/ejm-33-341-2021.pdf |
| spellingShingle | B. Krüger E. V. Galuskin I. O. Galuskina H. Krüger Y. Vapnik Kahlenbergite KAl<sub>11</sub>O<sub>17</sub>, a new <i>β</i>-alumina mineral and Fe-rich hibonite from the Hatrurim Basin, the Negev desert, Israel European Journal of Mineralogy |
| title | Kahlenbergite KAl<sub>11</sub>O<sub>17</sub>, a new <i>β</i>-alumina mineral and Fe-rich hibonite from the Hatrurim Basin, the Negev desert, Israel |
| title_full | Kahlenbergite KAl<sub>11</sub>O<sub>17</sub>, a new <i>β</i>-alumina mineral and Fe-rich hibonite from the Hatrurim Basin, the Negev desert, Israel |
| title_fullStr | Kahlenbergite KAl<sub>11</sub>O<sub>17</sub>, a new <i>β</i>-alumina mineral and Fe-rich hibonite from the Hatrurim Basin, the Negev desert, Israel |
| title_full_unstemmed | Kahlenbergite KAl<sub>11</sub>O<sub>17</sub>, a new <i>β</i>-alumina mineral and Fe-rich hibonite from the Hatrurim Basin, the Negev desert, Israel |
| title_short | Kahlenbergite KAl<sub>11</sub>O<sub>17</sub>, a new <i>β</i>-alumina mineral and Fe-rich hibonite from the Hatrurim Basin, the Negev desert, Israel |
| title_sort | kahlenbergite kal sub 11 sub o sub 17 sub a new i β i alumina mineral and fe rich hibonite from the hatrurim basin the negev desert israel |
| url | https://ejm.copernicus.org/articles/33/341/2021/ejm-33-341-2021.pdf |
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