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Native tungsten from the Bol'shaya Pol'ya river valley and Mt Neroyka, Russia

Mills, Stuart J. and Kartashov, Pavel M. and Kampf, Anthony R. and Rumsey, Mike S. and Ma, Chi and Stanley, Chris J. and Spratt, John and Rossman, George R. and Novgorodova, Margarita I. (2021) Native tungsten from the Bol'shaya Pol'ya river valley and Mt Neroyka, Russia. Mineralogical Magazine, 85 (1). pp. 76-81. ISSN 0026-461X. doi:10.1180/mgm.2021.7.

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Native tungsten (IMA2011-004), W, is officially described as a new mineral from gold placers in the Bol'shaya Pol'ya river valley, Prepolar Urals, Russia, associated with yttriaite-(Y) and from quartz veins in the Mt Neroyka rock-crystal field, Ust–Puiva, Tyumenskaya Oblast', Russia. Tungsten forms polycrystalline grains and masses, and rarely cubo-octahedra. It is silver white to steel grey in colour, with metallic lustre and grey streak. The calculated density is 19.226 g/cm³. The Vickers hardness (VHN₂₅) is 571.45 kg/mm². In plane polarised light, tungsten is white with a pale-yellow tint and optically isotropic. Electron microprobe analyses of Bol'shaya Pol'ya river valley material provided W 99.27, Mo 0.06, Mn 0.04, Fe 0.01, total 99.38 wt.%. The five strongest powder X-ray diffraction lines are [d_(obs) Å(I)(hkl)]: 2.2422(100)(110), 1.5835(25)(200), 1.2929(48)(211), 1.0010(23)(310) and 0.8457(24)(321). Tungsten is cubic, Imm, a = 3.1648(4) Å, V = 31.69(4) ų and Z = 2. Some additional occurrences of native tungsten and technogenic tungsten found in Nature are also described.

Item Type:Article
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Kampf, Anthony R.0000-0001-8084-2563
Ma, Chi0000-0002-1828-7033
Rossman, George R.0000-0002-4571-6884
Additional Information:© The Author(s), 2021. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland. (Received 11 November 2020; accepted 21 January 2021; Accepted Manuscript published online: 26 January 2021; Associate Editor: Daniel Atencio) This paper is part of a thematic set in memory of Frank Reith. This paper is dedicated to Frank Reith who's spirit and endeavour to discover information about metals has inspired us to explore the world and discover more about the origin of precious metals and deposits. The paper benefited from constructive reviews by Daniel Atencio and an anonymous reviewer. We thank Elena Anikina for providing samples from the Tabornoe deposit and Anatoly Kasatkin for confirmation of native tungsten from Tabornoe by EBSD. A portion of this study was funded by the John Jago Trelawney Endowment to the Mineral Sciences Department of the Natural History Museum of Los Angeles County.
Funding AgencyGrant Number
John Jago Trelawney EndowmentUNSPECIFIED
Subject Keywords:tungsten, new mineral, Bol’shaya Pol’ya river valley, Prepolar Urals, Russia, Mt Neroyka, rock crystal, Ust–Puiva, Tyumenskaya Oblast’, Russia
Issue or Number:1
Record Number:CaltechAUTHORS:20210429-144554144
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Official Citation:Mills, S., Kartashov, P., Kampf, A., Rumsey, M., Ma, C., Stanley, C., . . . Novgorodova, M. (2021). Native tungsten from the Bol'shaya Pol'ya river valley and Mt Neroyka, Russia. Mineralogical Magazine, 85(1), 76-81. doi:10.1180/mgm.2021.7
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108888
Deposited By: George Porter
Deposited On:30 Apr 2021 21:14
Last Modified:16 Nov 2021 19:33

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