Second Natural Occurrence of KFeS2 (Hanswilkeite): An Inclusion in Diamond from the Udachnaya Kimberlite Pipe (Siberian Craton, Yakutia)
Potassium sulfide KFeS2 (hanswilkeite) has been identified in polymineralic inclusions in a diamond from the Udachnaya kimberlite pipe (Siberian craton, Yakutia). This is the second occurrence of hanswilkeite in nature and the first one in mantle-derived samples. Sulfide KFeS2 is monoclinic, the spa...
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ftmdpi:oai:mdpi.com:/2075-163X/13/7/874/ 2023-08-20T04:10:20+02:00 Second Natural Occurrence of KFeS2 (Hanswilkeite): An Inclusion in Diamond from the Udachnaya Kimberlite Pipe (Siberian Craton, Yakutia) Alla M. Logvinova Igor S. Sharygin agris 2023-06-28 application/pdf https://doi.org/10.3390/min13070874 EN eng Multidisciplinary Digital Publishing Institute Mineral Geochemistry and Geochronology https://dx.doi.org/10.3390/min13070874 https://creativecommons.org/licenses/by/4.0/ Minerals; Volume 13; Issue 7; Pages: 874 diamond potassium sulfide inclusion kimberlite mantle craton Text 2023 ftmdpi https://doi.org/10.3390/min13070874 2023-08-01T10:39:52Z Potassium sulfide KFeS2 (hanswilkeite) has been identified in polymineralic inclusions in a diamond from the Udachnaya kimberlite pipe (Siberian craton, Yakutia). This is the second occurrence of hanswilkeite in nature and the first one in mantle-derived samples. Sulfide KFeS2 is monoclinic, the space group—C 2/c. Its crystal structure consists of chains with K in the interstices. The tetrahedra are centered by iron ions and linked by edges, thus forming chains of [FeS2] frameworks. The strongest lines of the electron diffraction powder pattern are 7.05 Å—(200); 5.34 Å (02¯0); and 3.05 Å (22¯0), and the angles between directions are <22¯0/02¯0>—60° and <22¯0/200>—30°. KFeS2 has been found as a discrete phase within polymineralic inclusions consisting of apatite, ilmenite, chondrodite, phlogopite, dolomite, and a fluid phase. The data obtained from the composition of the hanswilkeite (KFeS2) inclusion and other rare minerals (chondrodite, Mg-apatite, Cr-ilmenite) in primary inclusions in a diamond from the Udachnaya kimberlite testify to the important role of metasomatic processes in diamond formation. Text Yakutia MDPI Open Access Publishing Minerals 13 7 874 |
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diamond potassium sulfide inclusion kimberlite mantle craton |
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diamond potassium sulfide inclusion kimberlite mantle craton Alla M. Logvinova Igor S. Sharygin Second Natural Occurrence of KFeS2 (Hanswilkeite): An Inclusion in Diamond from the Udachnaya Kimberlite Pipe (Siberian Craton, Yakutia) |
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diamond potassium sulfide inclusion kimberlite mantle craton |
description |
Potassium sulfide KFeS2 (hanswilkeite) has been identified in polymineralic inclusions in a diamond from the Udachnaya kimberlite pipe (Siberian craton, Yakutia). This is the second occurrence of hanswilkeite in nature and the first one in mantle-derived samples. Sulfide KFeS2 is monoclinic, the space group—C 2/c. Its crystal structure consists of chains with K in the interstices. The tetrahedra are centered by iron ions and linked by edges, thus forming chains of [FeS2] frameworks. The strongest lines of the electron diffraction powder pattern are 7.05 Å—(200); 5.34 Å (02¯0); and 3.05 Å (22¯0), and the angles between directions are <22¯0/02¯0>—60° and <22¯0/200>—30°. KFeS2 has been found as a discrete phase within polymineralic inclusions consisting of apatite, ilmenite, chondrodite, phlogopite, dolomite, and a fluid phase. The data obtained from the composition of the hanswilkeite (KFeS2) inclusion and other rare minerals (chondrodite, Mg-apatite, Cr-ilmenite) in primary inclusions in a diamond from the Udachnaya kimberlite testify to the important role of metasomatic processes in diamond formation. |
format |
Text |
author |
Alla M. Logvinova Igor S. Sharygin |
author_facet |
Alla M. Logvinova Igor S. Sharygin |
author_sort |
Alla M. Logvinova |
title |
Second Natural Occurrence of KFeS2 (Hanswilkeite): An Inclusion in Diamond from the Udachnaya Kimberlite Pipe (Siberian Craton, Yakutia) |
title_short |
Second Natural Occurrence of KFeS2 (Hanswilkeite): An Inclusion in Diamond from the Udachnaya Kimberlite Pipe (Siberian Craton, Yakutia) |
title_full |
Second Natural Occurrence of KFeS2 (Hanswilkeite): An Inclusion in Diamond from the Udachnaya Kimberlite Pipe (Siberian Craton, Yakutia) |
title_fullStr |
Second Natural Occurrence of KFeS2 (Hanswilkeite): An Inclusion in Diamond from the Udachnaya Kimberlite Pipe (Siberian Craton, Yakutia) |
title_full_unstemmed |
Second Natural Occurrence of KFeS2 (Hanswilkeite): An Inclusion in Diamond from the Udachnaya Kimberlite Pipe (Siberian Craton, Yakutia) |
title_sort |
second natural occurrence of kfes2 (hanswilkeite): an inclusion in diamond from the udachnaya kimberlite pipe (siberian craton, yakutia) |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/min13070874 |
op_coverage |
agris |
genre |
Yakutia |
genre_facet |
Yakutia |
op_source |
Minerals; Volume 13; Issue 7; Pages: 874 |
op_relation |
Mineral Geochemistry and Geochronology https://dx.doi.org/10.3390/min13070874 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/min13070874 |
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Minerals |
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13 |
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7 |
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874 |
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