Sidorovite, PtFe3, A NEW MINERAL FROM THE SNEGOVAYA RIVER PLACER, KORYAK HIGHLANDS, RUSSIA

Author:

Kutyrev Anton1,Mcdonald Andrew M.2,Tamura Nobumichi3,Cabri Louis J.4,Tolstykh Nadezhda5,Pekov Igor V.6

Affiliation:

1. Institute of Volcanology and Seismology, Far Eastern Branch of the Russian Academy of Sciences, Piip Boulevard 9, Petropavlovsk-Kamchatsky, Russia, 683006

2. Harquail School of Earth Sciences, Laurentian University, 935 Ramsey Lake Road, Sudbury, Ontario P3E 2C6, Canada

3. Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720-8229, USA

4. 514 Queen Elizabeth Drwy, Ottawa, Ontario K1S 3N4, Canada

5. Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Science, 3 Prospekt Koptyuga, 630090 Novosibirsk, Russia

6. Faculty of Geology, Moscow State University, Vorobievy Gory, 119991 Moscow, Russia

Abstract

Abstract Sidorovite, ideally PtFe3, is a new mineral from the Epilchik ultramafic complex and nearby Snegovaya River placer, Koryak Highlands, Russia. It was found in isoferroplatinum grains extracted from a heavy-mineral concentrate obtained from crushed lode chromitites and alluvial material. Sidorovite occurs either as a part of complex grains comprising tetraferroplatinum, native iron, hollingworthite, magnetite, serpentine, and chromite or as part of secondary rims which formed together with tetraferroplatinum after isoferroplatinum. According to the Laue pattern obtained by synchrotron microdiffraction, sidorovite is cubic, crystallizing in space group Pm3¯m and adopting an Au3Cu-type crystal structure. Its unit-cell parameters are a = 3.725(4) Å, V = 51.687(4) Å3, Z = 1. The calculated density is 11.815 g/cm3. The strongest X-ray diffraction lines are [d (Å) (I, %) (hkl)] 2.161 (100) (111), 3.711 (48) (100), 1.871 (36) (200), 1.673 (27) (210). No cleavage was observed and hardness could not be determined owing to the small size of the grains. The empirical formula of sidorovite calculated based on four atoms is: Pt1.04(Fe2.89Cu0.05Ni0.02)Σ2.96. The mineral is posited to form through the incorporation of Fe0 by tetraferroplatinum, which arises through the reduction of Fe via H2-bearing fluids produced through the serpentinization of olivine at T < 450 °C. The name of the new mineral honors the Russian geologist and mineralogist Evgeniy Gennadievich Sidorov (1955–2021).

Publisher

Mineralogical Association of Canada

Reference36 articles.

1. Variations of major and minor elements in Pt–Fe Alloy Minerals: A Review and New Observations;Barkov,;Minerals,(2019)

2. Tectonic position and origins of the zoned mafic-ultramafic plutons in the Northern Olyutor Zone, Koryak Highlands;Batanova,;Geotectonics,(1992)

3. Platinum-iron alloys; a nomenclature based on a study of natural and synthetic alloys;Cabri,;The Canadian Mineralogist,(1975)

4. Re-examination of Pt alloys from lode and placer deposits, Urals;Cabri,;The Canadian Mineralogist,(1991)

5. The mineralogy of Pt-Fe alloys and phase relations in the Pt–Fe binary system;Cabri,;The Canadian Mineralogist,(2022)

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3