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

Published online by Cambridge University Press:  26 January 2021

Stuart J. Mills*
Geosciences, Museums Victoria, GPO Box 666, Melbourne3001, Victoria, Australia
Pavel M. Kartashov
Institute of Geology Ore Deposits, Petrography, Mineralogy and Geochemistry (IGEM) of Russian Academy of Sciences, Staromonetnyi pereulok 35, 109017Moscow, Russia
Anthony R. Kampf
Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California90007, USA
Mike S. Rumsey
Earth Sciences Department, Natural History Museum, Cromwell Road, LondonSW7 5BD, UK
Chi Ma
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California91125, USA
Chris J. Stanley
Earth Sciences Department, Natural History Museum, Cromwell Road, LondonSW7 5BD, UK
John Spratt
Department of Core Research Laboratories, Natural History Museum, Cromwell Road, LondonSW7 5BD, UK
George R. Rossman
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California91125, USA
Margarita I. Novgorodova
Fersman Mineralogical Museum, Leninskiy Prospekt 18(2), Moscow117071, Russia
*Author for correspondence: Stuart J. Mills, Email:


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 [dobs 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, Im$\bar{3}$m, a = 3.1648(4) Å, V = 31.69(4) Å3 and Z = 2. Some additional occurrences of native tungsten and technogenic tungsten found in Nature are also described.

Article – Frank Reith memorial issue
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland

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This paper is part of a thematic set in memory of Frank Reith.

Associate Editor: Daniel Atencio


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