ALLABOGDANITE, (FE,NI)2P, A NEW MINERAL FROM THE ONELLO METEORITE: THE OCCURRENCE AND CRYSTAL STRUCTURE
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dc.contributor.author | Britvin S.N. | |
dc.contributor.author | Rudashevsky N.S. | |
dc.contributor.author | Krivovichev S.V. | |
dc.contributor.author | Burns P.C. | |
dc.contributor.author | Polekhovsky Y.S. | |
dc.date.accessioned | 2021-09-23T04:09:45Z | |
dc.date.available | 2021-09-23T04:09:45Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=13397442 | |
dc.identifier.citation | American Mineralogist, 2002, 87, 8-9, 1245-1249 | |
dc.identifier.issn | 0003-004X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/30497 | |
dc.description.abstract | Allabogdanite, (Fe,Ni)2P, is a new mineral from the Onello iron meteorite (Ni-rich ataxite). It occurs as thin lamellar crystals disseminated in plessite. Associated minerals are nickelphosphide, schreibersite, awaruite, and graphite. Crystals of the mineral, up to 0.4 × 0.1 × 0.01 mm, are flattened on (001) with dominant {001} faces, and other faces that are probably {110} and {100}. Mirror twinning resembling that of gypsum is common, with possible twin composition plane {110}. Crystals are light straw-yellow with bright metallic luster. Polished (001) sections look silvery-white against an epoxy background. In reflected light in air, the mineral has a creamy color, with distinct anisotropy from light to dark creamy tint. No bireflectance was observed. R1/R2(λ,nm) in air: 48.4/37.2(440), 46.7/36.8(460), 47.0/37.6(480), 47.5/38.1(500), 47.6/38.8(520), 48.2/39.2(540). 49.0/39.9(560), 49.6/40.7(580), 50.1/41.6(600), 50.5/41.9(620), 51.9/43.0(640), 52.3/44.3(660), 53.3/ 45.0(680), 54.4/46.2(700). No cleavage or parting was observed. Moh's hardness is 5-6; the mineral is very brittle, and its calculated density 7.10 g/cm3. Its chemical composition (determined by microprobe methods, average of nine analyses) is: Fe 57.7, Ni 20.7, Co 1.4, P 20.4, Total 100.2 wt%, corresponding to ([F0]≥4σF) reflections. Orthorhombic, Pnma. unit-cell parameters refined from powder data: a = 5.748(2), b = 3.548(1), c = 6.661(2) Å, V = 135.8(1), Å3, Z = 4; unit-cell parameters refined from single-crystal data: a = 5.792(7), b = 3.564(4), c = 6.691(8) Å, and V = 138.1(3) Å3. Strongest reflections in the X-ray powder diffraction pattern are [d in Å, (1) (hkl)]: 2.238(100)(112), 2.120(80)(211), 2.073(70)(103), 1.884(50)(013), 1.843(40)(301), 1.788(40)(113), 1.774(40)(020). The mineral is named for Alla Bogdanova, Geological Institute, Kola Science Centre of Russian Academy of Sciences. | |
dc.title | ALLABOGDANITE, (FE,NI)2P, A NEW MINERAL FROM THE ONELLO METEORITE: THE OCCURRENCE AND CRYSTAL STRUCTURE | |
dc.type | Статья |
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