| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Spratt, John
Natural History Museum
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2022Polytypism in mcalpineite: a study of natural and synthetic Cu3TeO6citations
- 2021Kernowite, Cu<sub>2</sub>Fe(AsO<sub>4</sub>)(OH)<sub>4</sub>⋅4H<sub>2</sub>O, the Fe<sup>3+</sup>-analogue of liroconite from Cornwall, UKcitations
- 2021Oscillatory- and sector-zoned pyrochlore from carbonatites of the Kerimasi volcano, Gregory rift, Tanzaniacitations
- 2021Elucidating the natural–synthetic mismatch of Pb2+Te4+O3: The redefinition of fairbankite to Pb122+(Te4+O3)11(SO4)citations
- 2021Native tungsten from the Bol'shaya Pol'ya river valley and Mt Neroyka, Russia
- 2021Wildcatite, CaFe3+Te6+O5(OH), the second new tellurate mineral from the Detroit district, Juab County, Utahcitations
- 2021Hybridization of Alkali Basaltic Magmas: a Case Study of the Ogol Lavas from the Laetoli Area, Crater Highlands (Tanzania)citations
- 2019Dokuchaevite, Cu<sub>8</sub>O<sub>2</sub>(VO<sub>4</sub>)<sub>3</sub>Cl<sub>3</sub>, a new mineral with remarkably diverse Cu<sup>2+</sup> mixed-ligand coordination environmentscitations
- 2019The crystal structures of the mixed-valence tellurium oxysalts tlapallite, (Ca,Pb)<sub>3</sub>CaCu<sub>6</sub>[Te<sup>4+</sup><sub>3</sub>Te<sup>6+</sup>O<sub>12</sub>]<sub>2</sub>(Te<sup>4+</sup>O<sub>3</sub>)<sub>2</sub>(SO<sub>4</sub>)<sub>2</sub>·3H<sub>2</sub>O, and carlfriesite, CaTe<sup>4+</sup><sub>2</sub>Te<sup>6+</sup>O<sub>8</sub>citations
- 2015Barrydawsonite-(Y), Na<sub>1.5</sub>CaY<sub>0.5</sub>Si<sub>3</sub>O<sub>9</sub>H: a new pyroxenoid of the pectolite–serandite groupcitations
- 2013Diegogattaite, Na<sub>2</sub>CaCu<sub>2</sub>Si<sub>8</sub>O<sub>2</sub>0·H<sub>2</sub>O: a new nanoporous copper sheet silicate from Wessels Mine, Kalahari Manganese Fields, Republic of South Africacitations
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article
Native tungsten from the Bol'shaya Pol'ya river valley and Mt Neroyka, Russia
Abstract
<jats:title>Abstract</jats:title><jats:p>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/cm<jats:sup>3</jats:sup>. The Vickers hardness (VHN<jats:sub>25</jats:sub>) is 571.45 kg/mm<jats:sup>2</jats:sup>. 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 [<jats:italic>d</jats:italic><jats:sub>obs</jats:sub> Å(<jats:italic>I</jats:italic>)(<jats:italic>hkl</jats:italic>)]: 2.2422(100)(110), 1.5835(25)(200), 1.2929(48)(211), 1.0010(23)(310) and 0.8457(24)(321). Tungsten is cubic, <jats:italic>Im</jats:italic><jats:inline-formula><jats:alternatives><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" mime-subtype="png" xlink:href="S0026461X21000074_inline1.png" /><jats:tex-math>${3}$</jats:tex-math></jats:alternatives></jats:inline-formula><jats:italic>m</jats:italic>, <jats:italic>a</jats:italic> = 3.1648(4) Å, <jats:italic>V</jats:italic> = 31.69(4) Å<jats:sup>3</jats:sup> and <jats:italic>Z</jats:italic> = 2. Some additional occurrences of native tungsten and technogenic tungsten found in Nature are also described.</jats:p>