Тип публикации: статья из журнала

Год издания: 2019

Идентификатор DOI: 10.1180/mgm.2019.31

Ключевые слова: ognitite, NiBiTe, new mineral species, Co-rich maucherite, zonation in arsenides, rapid cooling, Ognit complex, nickel-cobalt mineralisation, ultramafic rocks, Eastern Sayans, Russia

Аннотация: We describe the new species ognitite, NiBiTe, and a Co-rich variety of maucherite, hitherto unreported; both were discovered in the Ognit ultramafic complex of Neoproterozoic age in Eastern Sayans, Russia. The mean composition of ognitite (n = 7) is: Ni 17.05, Fe 0.07, Cu 0.14, Pd 0.14, Te 32.53, Bi 49.64, total 99.57 wt.%, correspПоказать полностьюonding to: (Ni1.11Cu0.008Fe0.005Pd0.003)(Sigma 1.13)Bi0.90Te0.97 (Sigma atoms = 3 apfu). Ognitite is trigonal, space group P3m1 [R-1 = 0.0276 for 81 reflections with F-o > 4 sigma(F-o)]. The unit-cell parameters derived from the single-crystal X-ray diffraction data are: a = 3.928(1) angstrom, c = 5.385(1) angstrom and V = 71.95(4) angstrom(3), with Z = 1. The c:a ratio is 1.37. The powder X-ray diffraction data obtained on the same fragment used for the single-crystal study are: a = 3.9332(4) angstrom, c = 5.3920(6) angstrom and V = 72.24(1) angstrom(3). Ognitite exhibits the brucite-type structure with edge-sharing NiTe3Bi3 octahedra forming sheets parallel to (0001). It is related to melonite, but is distinct compositionally by the extreme Bi-enrichment (melonite and its synthetic analogue contain

Журнал: MINERALOGICAL MAGAZINE

Выпуск журнала: Vol. 83, Is. 5

Номера страниц: 695-703

ISSN журнала: 0026461X

Место издания: TWICKENHAM

Издатель: MINERALOGICAL SOC

• Barkov Andrei Y. (Cherepovets State Univ, Res Lab Ind & Ore Mineral, 5 Lunacharsky Ave, Cherepovets 162600, Russia)
• Bindi Luca (Univ Firenze, Dipartimento Sci Terra, Via G La Pira 4, I-50121 Florence, Italy)
• Tamura Nobumichi (Lawrence Berkeley Natl Lab, Adv Light Source, 1 Cyclotron Rd, Berkeley, CA 94720 USA)
• Shvedov Gennadiy (Siberian Fed Univ, Inst Min Geol & Geotechnol, 95 Ave Prospekt Gazety Krasnoyarskiy Rabochiy, Krasnoyarsk 660025, Russia)
• Winkler Bjoern (Goethe Univ Frankfurt, Inst Geowissensch, Altenhoferallee 1, D-60438 Frankfurt, Germany)
• Stan Camelia (Lawrence Berkeley Natl Lab, Adv Light Source, 1 Cyclotron Rd, Berkeley, CA 94720 USA)
• Morgenroth Wolfgang (Goethe Univ Frankfurt, Inst Geowissensch, Altenhoferallee 1, D-60438 Frankfurt, Germany)
• Martin Robert F. (McGill Univ, Dept Earth & Planetary Sci, 3450 Univ St, Montreal, PQ H3A 0E8, Canada)
• Zaccarini Federica (Univ Leoben, Dept Appl Geosci & Geophys, Peter Tunner Str 5, A-8700 Leoben, Austria)
• Stanley Christopher J. (Nat Hist Museum, Econ & Environm Earth Sci Div, Cromwell Rd, London SW7 5BD, EnglandArticle)

• Web of Science Core Collection