| Reference Type | Journal (article/letter/editorial) |
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| Title | Transjordanite, Ni2P, a new terrestrial and meteoritic phosphide, and natural solid solutions barringerite-transjordanite (hexagonal Fe2P–Ni2P) |
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| Journal | American Mineralogist |
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| Authors | Britvin, Sergey N. | Author |
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| Murashko, Michail N. | Author |
| Vapnik, Yevgeny | Author |
| Polekhovsky, Yury S. | Author |
| Krivovichev, Sergey V. | Author |
| Krzhizhanovskaya, Maria G. | Author |
| Vereshchagin, Oleg S. | Author |
| Shilovskikh, Vladimir V. | Author |
| Vlasenko, Natalia S. | Author |
| Year | 2020 (March 1) | Volume | 105 |
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| Page(s) | 428-436 | Issue | 3 |
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| Publisher | Mineralogical Society of America |
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| DOI | doi:10.2138/am-2020-7275Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 4564470 | Long-form Identifier | mindat:1:5:4564470:2 |
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| GUID | 67f7758a-db2f-45e0-add0-69947c359d3b |
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| Full Reference | Britvin, Sergey N., Murashko, Michail N., Vapnik, Yevgeny, Polekhovsky, Yury S., Krivovichev, Sergey V., Krzhizhanovskaya, Maria G., Vereshchagin, Oleg S., Shilovskikh, Vladimir V., Vlasenko, Natalia S. (2020) Transjordanite, Ni2P, a new terrestrial and meteoritic phosphide, and natural solid solutions barringerite-transjordanite (hexagonal Fe2P–Ni2P) American Mineralogist, 105 (3) 428-436 doi:10.2138/am-2020-7275 |
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| Plain Text | Britvin, Sergey N., Murashko, Michail N., Vapnik, Yevgeny, Polekhovsky, Yury S., Krivovichev, Sergey V., Krzhizhanovskaya, Maria G., Vereshchagin, Oleg S., Shilovskikh, Vladimir V., Vlasenko, Natalia S. (2020) Transjordanite, Ni2P, a new terrestrial and meteoritic phosphide, and natural solid solutions barringerite-transjordanite (hexagonal Fe2P–Ni2P) American Mineralogist, 105 (3) 428-436 doi:10.2138/am-2020-7275 |
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| In | (2020, March) American Mineralogist Vol. 105 (3) Mineralogical Society of America |
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| Abstract/Notes | This paper is a first detailed report of natural hexagonal solid solutions along the join Fe2P–Ni2P. Transjordanite, Ni2P, a Ni-dominant counterpart of barringerite (a low-pressure polymorph of Fe2P), is a new mineral. It was discovered in the pyrometamorphic phosphide assemblages of the Hatrurim Formation (the Dead Sea area, Southern Levant) and was named for the occurrence on the Transjordan Plateau, West Jordan. Later on, the mineral was confirmed in the Cambria meteorite (iron ungrouped, fine octahedrite), and it likely occurs in CM2 carbonaceous chondrites (Mighei group). Under reflected light, transjordanite is white with a beige tint. It is non-pleochroic and weakly anisotropic. Reflectance values for four COM recommended wavelengths are [Rmax/Rmin, % (λ, nm)]: 45.1/44.2 (470), 49.9/48.5 (546), 52.1/50.3 (589), 54.3/52.1 (650). Transjordanite is hexagonal, space group P62m; unit-cell parameters for the holotype specimen, (Ni1.72Fe0.27)1.99P1.02, are: a = 5.8897(3), c = 3.3547(2) Å, V = 100.78(1) Å3, Z = 3. Dcalc = 7.30 g/cm3. The crystal structure of holotype transjordanite was solved and refined to R1 = 0.013 based on 190 independent observed [I > 2σ(I)] reflections. The crystal structure represents a framework composed of two types of infinite rods propagated along the c-axis: (1) edge-sharing tetrahedra [M(1)P4] and (2) edge-sharing [M(2)P5] square pyramids. Determination of unit-cell parameters for 12 members of the Fe2P–Ni2P solid-solution series demonstrates that substitution of Ni for Fe in transjordanite and vice versa in barringerite does not obey Vegard’s law, indicative of preferential incorporation of minor substituent into M(1) position. Terrestrial transjordanite may contain up to 3 wt% Mo, whereas meteoritic mineral bears up to 0.2 wt% S. |
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