Nickolayite, FeMoP, a new natural molybdenum phosphide

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Nickolayite, FeMoP, a new natural molybdenum phosphide. / Murashko, Mikhail N.; Britvin, Sergey N.; Vapnik, Yevgeny; Polekhovsky, Yury S.; Shilovskikh, Vladimir V.; Zaitsev, Anatoly N.; Vereshchagin, Oleg S.

In: Mineralogical Magazine, Vol. 86, No. 5, 30.10.2022, p. 749-757.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{4809cae137db42b288adc9e1fa1360f3,

title = "Nickolayite, FeMoP, a new natural molybdenum phosphide",

abstract = "Nickolayite, FeMoP, is a new terrestrial phosphide structurally related to allabogdanite (highpressure modification of (Fe,Ni)2P), meteoritic phosphides florenskyite, FeTiP and andreyivanovite, FeCrP. From the point of view of chemical composition, nickolayite is a Fe-analogue of monipite, MoNiP. The mineral was discovered in the Daba-Siwaqa complex (Central Jordan), a part of the pyrometamorphic Hatrurim Formation (the Mottled Zone), whose outcrops encompass a 150×200 km2 area around the Dead Sea in the Middle East. Nickolayite appears as an accessory phase in the fused clinopyroxene-plagioclase rocks texturally resembling gabbro-dolerite. The irregularly shaped grains of the mineral, up to 80 μ m in size are associated with baryte, tridymite, chromite, hematite, pyrrhotite, fluorapatite, titanite, and powellite. Macroscopically, nickolayite grains possess lightgrey to greyish-white colour and metallic lustre. The mineral is ductile. The mean VHN hardness (50 g load) is 538 kg mm-2. The calculated density based on the empirical formula and the unit-cell parameters is 7.819 g cm-1. In reflected light, nickolayite has white colour, with no bireflectance and pleochroism. The COM approved reflectance values [Rmax/Rmin (%), ?(nm)]: 48.5/46.5 (470), 50.5/48.5 (546), 51.8/49.9 (589), 53.9/52.0 (650). Chemical composition of the holotype crystal (electron microprobe, average of 4 analyses, wt.%): Fe 32.21, Mo 47.06, Ni 3.69, Co 0.13, P 17.45, Total 100.54, that corresponds to the empirical formula Fe1.00(Mo0.87Ni0.11Fe0.02)1.00P1.00 and an ideal formula of FeMoP. Nickolayite is orthorhombic, space group Pnma, unit-cell parameters of holotype material: a 5.9519(5), b 3.7070(3), c 6.8465(6) , V = 151.06(2) 3 and Z = 4. The crystal structure of holotype material was solved and refined to R1 = 0.0174 based on 251 unique observed reflections. The origin of the mineral is likely connected to the processes of co-reduction of molybdenum- and phosphorus-bearing minerals during high-temperature pyrometamorphic processes.",

keywords = "Dead Sea, Hatrurim Formation, Middle East, crystal structure, gabbro-dolerite, molybdenum, phosphide, pyrometamorphism",

author = "Murashko, {Mikhail N.} and Britvin, {Sergey N.} and Yevgeny Vapnik and Polekhovsky, {Yury S.} and Shilovskikh, {Vladimir V.} and Zaitsev, {Anatoly N.} and Vereshchagin, {Oleg S.}",

year = "2022",

month = oct,

day = "30",

doi = "10.1180/mgm.2022.52",

language = "English",

volume = "86",

pages = "749--757",

journal = "Mineralogical Magazine",

issn = "0026-461X",

publisher = "Mineralogical Society",

number = "5",

}

RIS

TY - JOUR

T1 - Nickolayite, FeMoP, a new natural molybdenum phosphide

AU - Murashko, Mikhail N.

AU - Britvin, Sergey N.

AU - Vapnik, Yevgeny

AU - Polekhovsky, Yury S.

AU - Shilovskikh, Vladimir V.

AU - Zaitsev, Anatoly N.

AU - Vereshchagin, Oleg S.

PY - 2022/10/30

Y1 - 2022/10/30

N2 - Nickolayite, FeMoP, is a new terrestrial phosphide structurally related to allabogdanite (highpressure modification of (Fe,Ni)2P), meteoritic phosphides florenskyite, FeTiP and andreyivanovite, FeCrP. From the point of view of chemical composition, nickolayite is a Fe-analogue of monipite, MoNiP. The mineral was discovered in the Daba-Siwaqa complex (Central Jordan), a part of the pyrometamorphic Hatrurim Formation (the Mottled Zone), whose outcrops encompass a 150×200 km2 area around the Dead Sea in the Middle East. Nickolayite appears as an accessory phase in the fused clinopyroxene-plagioclase rocks texturally resembling gabbro-dolerite. The irregularly shaped grains of the mineral, up to 80 μ m in size are associated with baryte, tridymite, chromite, hematite, pyrrhotite, fluorapatite, titanite, and powellite. Macroscopically, nickolayite grains possess lightgrey to greyish-white colour and metallic lustre. The mineral is ductile. The mean VHN hardness (50 g load) is 538 kg mm-2. The calculated density based on the empirical formula and the unit-cell parameters is 7.819 g cm-1. In reflected light, nickolayite has white colour, with no bireflectance and pleochroism. The COM approved reflectance values [Rmax/Rmin (%), ?(nm)]: 48.5/46.5 (470), 50.5/48.5 (546), 51.8/49.9 (589), 53.9/52.0 (650). Chemical composition of the holotype crystal (electron microprobe, average of 4 analyses, wt.%): Fe 32.21, Mo 47.06, Ni 3.69, Co 0.13, P 17.45, Total 100.54, that corresponds to the empirical formula Fe1.00(Mo0.87Ni0.11Fe0.02)1.00P1.00 and an ideal formula of FeMoP. Nickolayite is orthorhombic, space group Pnma, unit-cell parameters of holotype material: a 5.9519(5), b 3.7070(3), c 6.8465(6) , V = 151.06(2) 3 and Z = 4. The crystal structure of holotype material was solved and refined to R1 = 0.0174 based on 251 unique observed reflections. The origin of the mineral is likely connected to the processes of co-reduction of molybdenum- and phosphorus-bearing minerals during high-temperature pyrometamorphic processes.

AB - Nickolayite, FeMoP, is a new terrestrial phosphide structurally related to allabogdanite (highpressure modification of (Fe,Ni)2P), meteoritic phosphides florenskyite, FeTiP and andreyivanovite, FeCrP. From the point of view of chemical composition, nickolayite is a Fe-analogue of monipite, MoNiP. The mineral was discovered in the Daba-Siwaqa complex (Central Jordan), a part of the pyrometamorphic Hatrurim Formation (the Mottled Zone), whose outcrops encompass a 150×200 km2 area around the Dead Sea in the Middle East. Nickolayite appears as an accessory phase in the fused clinopyroxene-plagioclase rocks texturally resembling gabbro-dolerite. The irregularly shaped grains of the mineral, up to 80 μ m in size are associated with baryte, tridymite, chromite, hematite, pyrrhotite, fluorapatite, titanite, and powellite. Macroscopically, nickolayite grains possess lightgrey to greyish-white colour and metallic lustre. The mineral is ductile. The mean VHN hardness (50 g load) is 538 kg mm-2. The calculated density based on the empirical formula and the unit-cell parameters is 7.819 g cm-1. In reflected light, nickolayite has white colour, with no bireflectance and pleochroism. The COM approved reflectance values [Rmax/Rmin (%), ?(nm)]: 48.5/46.5 (470), 50.5/48.5 (546), 51.8/49.9 (589), 53.9/52.0 (650). Chemical composition of the holotype crystal (electron microprobe, average of 4 analyses, wt.%): Fe 32.21, Mo 47.06, Ni 3.69, Co 0.13, P 17.45, Total 100.54, that corresponds to the empirical formula Fe1.00(Mo0.87Ni0.11Fe0.02)1.00P1.00 and an ideal formula of FeMoP. Nickolayite is orthorhombic, space group Pnma, unit-cell parameters of holotype material: a 5.9519(5), b 3.7070(3), c 6.8465(6) , V = 151.06(2) 3 and Z = 4. The crystal structure of holotype material was solved and refined to R1 = 0.0174 based on 251 unique observed reflections. The origin of the mineral is likely connected to the processes of co-reduction of molybdenum- and phosphorus-bearing minerals during high-temperature pyrometamorphic processes.

KW - Dead Sea

KW - Hatrurim Formation

KW - Middle East

KW - crystal structure

KW - gabbro-dolerite

KW - molybdenum

KW - phosphide

KW - pyrometamorphism

UR - http://www.scopus.com/inward/record.url?scp=85131885204&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/6e1aff1b-93cf-3494-a19c-e3449ed2e912/

U2 - 10.1180/mgm.2022.52

DO - 10.1180/mgm.2022.52

M3 - Article

AN - SCOPUS:85131885204

VL - 86

SP - 749

EP - 757

JO - Mineralogical Magazine

JF - Mineralogical Magazine

SN - 0026-461X

IS - 5

ER -

ID: 97263957