Expanding the speciation of terrestrial molybdenum: discovery of polekhovskyite, MoNiP2, and insights into the sources of Mo-phosphides in the Dead Sea Transform area

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Expanding the speciation of terrestrial molybdenum: discovery of polekhovskyite, MoNiP2, and insights into the sources of Mo-phosphides in the Dead Sea Transform area. / Britvin, Sergey N.; Murashko, Mikhail N.; Vereschagin, Oleg S.; Vapnik, Yevgeny; Shilovskikh, Vladimir V/; Vlasenko, Natalia S.; Permyakov, Vitalii.

In: American Mineralogist, Vol. 107, No. 12, 01.12.2022, p. 2201-2211.

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

BibTeX

@article{0007a01b0dbc49b79ce3f7b4ef2007b6,

title = "Expanding the speciation of terrestrial molybdenum: discovery of polekhovskyite, MoNiP2, and insights into the sources of Mo-phosphides in the Dead Sea Transform area",

abstract = "Polekhovskyite, MoNiP2, is the first terrestrial Mo phosphide, a phosphorus-rich homologue of meteoritic monipite, MoNiP. The mineral represents a novel, phosphide type of terrestrial Mo speciation. It was discovered among phosphide assemblages in pyrometamorphic rocks of the Hatrurim Formation (the Mottled Zone) in Israel, the area confined to the Dead Sea Transform fault system. Polekhovskyite occurs in the altered diopside microbreccia, as micrometer-sized euhedral crystals intimately intergrown with murashkoite, FeP, and transjordanite, Ni2P, in association with Si-rich fluorapatite, hematite and magnetite. In reflected light, the mineral has a bluish-grey colour with no observable bireflectance and anisotropy. Chemical composition (electron microprobe, wt.%): Mo 44.10, Ni 22.73, Fe 4.60, P 29.02, total 100.45, that corresponds to the empirical formula Mo0.99(Ni0.83Fe0.18)1.01P2.01 and leads to the calculated density of 6.626 g cm-1. Polekhovskyite is hexagonal, space group P63/mmc, a 3.330(1), c 11.227(4) {\AA}, V 107.82(8) {\AA}3, and Z = 2. The crystal structure has been solved and refined to R1 = 0.0431 based on 50 unique observed reflections. The occurrence of Mo-bearing phosphides at the Dead Sea Transform area is a regional-scale phenomenon, with the localities tracked across both Israel and Jordan sides of the Dead Sea. The possible sources of Mo required for the formation of Mo-bearing phosphides are herein reviewed; they are likely related to the processes of formation of the Dead Sea Transform fault system. The problem of anthropogenic contamination of geological samples with Mo and Ni is also discussed in the paper, in context of the general aspects of discrimination between natural and technogenic ultra-reduced phases.",

keywords = "Ca-Al-rich inclusions, Dead Sea Rift, Molybdenum, anthropogenic contamination, carbonaceous chondrite, meteorite, phosphide, pyrometamorphism",

author = "Britvin, {Sergey N.} and Murashko, {Mikhail N.} and Vereschagin, {Oleg S.} and Yevgeny Vapnik and Shilovskikh, {Vladimir V/} and Vlasenko, {Natalia S.} and Vitalii Permyakov",

year = "2022",

month = dec,

day = "1",

doi = "10.2138/am-2022-8261",

language = "English",

volume = "107",

pages = "2201--2211",

journal = "American Mineralogist",

issn = "0003-004X",

publisher = "Mineralogical Society of America",

number = "12",

}

RIS

TY - JOUR

T1 - Expanding the speciation of terrestrial molybdenum: discovery of polekhovskyite, MoNiP2, and insights into the sources of Mo-phosphides in the Dead Sea Transform area

AU - Britvin, Sergey N.

AU - Murashko, Mikhail N.

AU - Vereschagin, Oleg S.

AU - Vapnik, Yevgeny

AU - Shilovskikh, Vladimir V/

AU - Vlasenko, Natalia S.

AU - Permyakov, Vitalii

PY - 2022/12/1

Y1 - 2022/12/1

N2 - Polekhovskyite, MoNiP2, is the first terrestrial Mo phosphide, a phosphorus-rich homologue of meteoritic monipite, MoNiP. The mineral represents a novel, phosphide type of terrestrial Mo speciation. It was discovered among phosphide assemblages in pyrometamorphic rocks of the Hatrurim Formation (the Mottled Zone) in Israel, the area confined to the Dead Sea Transform fault system. Polekhovskyite occurs in the altered diopside microbreccia, as micrometer-sized euhedral crystals intimately intergrown with murashkoite, FeP, and transjordanite, Ni2P, in association with Si-rich fluorapatite, hematite and magnetite. In reflected light, the mineral has a bluish-grey colour with no observable bireflectance and anisotropy. Chemical composition (electron microprobe, wt.%): Mo 44.10, Ni 22.73, Fe 4.60, P 29.02, total 100.45, that corresponds to the empirical formula Mo0.99(Ni0.83Fe0.18)1.01P2.01 and leads to the calculated density of 6.626 g cm-1. Polekhovskyite is hexagonal, space group P63/mmc, a 3.330(1), c 11.227(4) Å, V 107.82(8) Å3, and Z = 2. The crystal structure has been solved and refined to R1 = 0.0431 based on 50 unique observed reflections. The occurrence of Mo-bearing phosphides at the Dead Sea Transform area is a regional-scale phenomenon, with the localities tracked across both Israel and Jordan sides of the Dead Sea. The possible sources of Mo required for the formation of Mo-bearing phosphides are herein reviewed; they are likely related to the processes of formation of the Dead Sea Transform fault system. The problem of anthropogenic contamination of geological samples with Mo and Ni is also discussed in the paper, in context of the general aspects of discrimination between natural and technogenic ultra-reduced phases.

AB - Polekhovskyite, MoNiP2, is the first terrestrial Mo phosphide, a phosphorus-rich homologue of meteoritic monipite, MoNiP. The mineral represents a novel, phosphide type of terrestrial Mo speciation. It was discovered among phosphide assemblages in pyrometamorphic rocks of the Hatrurim Formation (the Mottled Zone) in Israel, the area confined to the Dead Sea Transform fault system. Polekhovskyite occurs in the altered diopside microbreccia, as micrometer-sized euhedral crystals intimately intergrown with murashkoite, FeP, and transjordanite, Ni2P, in association with Si-rich fluorapatite, hematite and magnetite. In reflected light, the mineral has a bluish-grey colour with no observable bireflectance and anisotropy. Chemical composition (electron microprobe, wt.%): Mo 44.10, Ni 22.73, Fe 4.60, P 29.02, total 100.45, that corresponds to the empirical formula Mo0.99(Ni0.83Fe0.18)1.01P2.01 and leads to the calculated density of 6.626 g cm-1. Polekhovskyite is hexagonal, space group P63/mmc, a 3.330(1), c 11.227(4) Å, V 107.82(8) Å3, and Z = 2. The crystal structure has been solved and refined to R1 = 0.0431 based on 50 unique observed reflections. The occurrence of Mo-bearing phosphides at the Dead Sea Transform area is a regional-scale phenomenon, with the localities tracked across both Israel and Jordan sides of the Dead Sea. The possible sources of Mo required for the formation of Mo-bearing phosphides are herein reviewed; they are likely related to the processes of formation of the Dead Sea Transform fault system. The problem of anthropogenic contamination of geological samples with Mo and Ni is also discussed in the paper, in context of the general aspects of discrimination between natural and technogenic ultra-reduced phases.

KW - Ca-Al-rich inclusions

KW - Dead Sea Rift

KW - Molybdenum

KW - anthropogenic contamination

KW - carbonaceous chondrite

KW - meteorite

KW - phosphide

KW - pyrometamorphism

UR - https://www.mendeley.com/catalogue/22d8bb23-fff7-3adb-a382-c1105e9d59f0/

UR - http://www.scopus.com/inward/record.url?scp=85131899210&partnerID=8YFLogxK

U2 - 10.2138/am-2022-8261

DO - 10.2138/am-2022-8261

M3 - Article

VL - 107

SP - 2201

EP - 2211

JO - American Mineralogist

JF - American Mineralogist

SN - 0003-004X

IS - 12

ER -

ID: 89535759