Zuktamrurite, FeP2, a new mineral, the phosphide analogue of löllingite, FeAs2

Britvin, Sergey N.; Murashko, Mikhail N.; Vapnik, Yevgeny; Polekhovsky, Yury S.; Krivovichev, Sergey V.; Vereshchagin, Oleg S.; Vlasenko, Natalia S.; Shilovskikh, Vladimir V.; Zaitsev, Anatoly N.

doi:10.1007/s00269-018-1008-4

Cited by 29 publications

(16 citation statements)

References 55 publications

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“…The discovery of cyclophosphates at the Dead Sea basin can invoke a reliable pathway for their native origin. As noted here, terrestrial cyclophosphates always associate with the natural iron diphosphide zuktamrurite, (Fe,Ni)P 2 (Britvin et al, 2019). The relationships between zuktamrurite and cyclophosphates ( Fig.…”

Section: Cyclophosphates and Prebiotic Phosphorylationsupporting

confidence: 63%

Cyclophosphates, a new class of native phosphorus compounds, and some insights into prebiotic phosphorylation on early Earth

Britvin

Murashko

Vapnik

et al. 2020

Geology

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Cyclophosphates are a class of energy-rich compounds whose hydrolytic decomposition (ring opening) liberates energy that is sufficient for initiation of biomimetic phosphorylation reactions. Because of that, cyclophosphates might be considered as a likely source of reactive prebiotic phosphorus on early Earth. A major obstacle toward adoption of this hypothesis is that cyclophosphates have so far not been encountered in nature. We herein report on the discovery of these minerals in the terrestrial environment, at the Dead Sea basin in Israel. Cyclophosphates represent the most condensed phosphate species known in nature. A pathway for cyclophosphate geosynthesis is herein proposed, involving simple pyrolytic oxidation of terrestrial phosphides. Discovery of natural cyclophosphates opens new opportunities for modeling prebiotic phosphorylation reactions that resulted in the emergence of primordial life on our planet.

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Section: Cyclophosphates and Prebiotic Phosphorylationsupporting

confidence: 63%

Cyclophosphates, a new class of native phosphorus compounds, and some insights into prebiotic phosphorylation on early Earth

Britvin

Murashko

Vapnik

et al. 2020

Geology

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“…While for the facets perpendicular to the c‐ axis, such as (031) and (111), the interplanar spacings were decreased by ≈1%. This corresponds to a high tensile strain in the ab ‐plane of the carbon‐modified FeP 2 catalyst in comparison with that of the pristine phase (orthorhombic FeP 2 , space group Pnnm ) …”

Section: Resultsmentioning

confidence: 99%

In Situ Induction of Strain in Iron Phosphide (FeP₂) Catalyst for Enhanced Hydroxide Adsorption and Water Oxidation

Yang

Rao

et al. 2020

Adv Funct Materials

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Carbon‐based materials have been widely used in heterogeneous catalysis because of their advantages of high surface area, thermal stability, and chemical inertness. However, their role in the catalysis is not fully understood although most studies conclude that the coupling between the carbon support and catalyst could reduce the charge transfer resistance and improve the kinetics of catalytic reactions such as water splitting. In this study, a carbon‐modified FeP2 electrocatalyst with a one‐step strategy is synthesized. The tensile strain is introduced in situ in the ab crystal plane of the FeP2 catalyst. This leads to charge redistribution between H and O atoms in the OH bonds and enhances the adsorption of reaction intermediates. In the water oxidation process, this results in a decrease in the energy barrier for the rate‐determining step, specifically, the chemical step of *OH adsorption preceded by one‐electron transfer. Benefiting from the optimized adsorption energy, the strained catalysts exhibit excellent oxygen evolution reaction (OER) activity with a low overpotential in addition to their increased stability. This study provides a new strategy for the introducing of strains in functional materials and provides new insights into the influence of carbon modification on OER activity.

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“…According to the calculated formula, tsikourasite could represent the Mo equivalent of the grains recently found in chromitites of the Alapaevsk and Gerakini-Ormylia ophiolites, located in Russia and Greece, respectively, characterized by the formula (Ni,Fe) 5 P [14,15]. Although tsikourasite is similar in composition to monipite (MoNiP) [7], to the recently discovered polekhovskyite (MoNiP 2 ) [11], and to the synthetic material MoNiP 2 [30], these phases are hexagonal and not cubic like tsikourasite.…”

Section: Relation To Other Speciesmentioning

confidence: 92%

“…Natural phosphides are very uncommon minerals and only 15 phases, listed below in alphabetic order, have been officially approved by the IMA: allabogdanite (Fe,Ni) 2 P [1], andreyivanovite Fe(Cr,Fe)P [2], barringerite (Fe,Ni) 2 P [3], florenskyite Fe(Ti,Ni)P [4], halamishite Ni 5 P 4 [5], melliniite (Ni,Fe) 4 P [6], monipite MoNiP [7], murashkoite FeP [8,9], negevite NiP 2 [5], nickelphosphide (Ni,Fe) 3 P [10], polekhovskyite MoNiP 2 [11], schreibersite (Fe,Ni) 3 P [12] and references therein, transjordanite Ni 2 P [5], and zuktamrurite FeP 2 [13]. Recently, Zaccarini et al [14] and Sideridis et al [15], based on microprobe analyses, reported the presence of a new phosphide, characterized by the stoichiometry (Ni,Fe) 5 P, in the ophiolitic chromitites of Gerakini-Ormylia, Greece and Alapaevsk, Russia.…”

Section: Introductionmentioning

confidence: 99%

Tsikourasite, Mo3Ni2P1+x (x < 0.25), a New Phosphide from the Chromitite of the Othrys Ophiolite, Greece

et al. 2019

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Tsikourasite, Mo3Ni2P1+x (x < 0.25), is a new phosphide discovered in a mantle-hosted podiform chromitite collected in the abandoned mine of Agios Stefanos (Othrys ophiolite), Central Greece. It forms tiny grains (from a few μm up to about 80 μm) and occurs as isolated grains or associated with other known minerals such as nickelphosphide and awaruite, and with undetermined minerals such as Ni-allabogdanite or Ni-barringerite and a V-sulphide. Tsikourasite is brittle and has a metallic luster. In plane-polarized light, tsikourasite is white yellow and it shows no bireflectance, anisotropism or pleochroism. Internal reflections were not observed, Reflectance values of tsikourasite in air (R in %) are: 55.7 at 470 nm, 56.8 at 546 nm, 57.5 at 589 nm and 58.5 at 650 nm. Five spot analyses of tsikourasite give the average composition: P 7.97, S 0.67, V 14.13, Fe 14.37, Co 7.59, Ni 23.9, and Mo 44.16, total 99.60 wt%, corresponding to the empirical formula (Mo1.778V1.071Fe0.082Co0.069)Σ3.000(Ni1.572Co0.428)Σ2.000(P0.981S0.079)Σ1.060, on the basis of Σ(Mo +V + Fe + Co + Ni) = 5 apfu and taking into account the structural results. The simplified formula is Mo3Ni2P1+x (x < 0.25). The density, which was calculated based on the empirical formula and single-crystal data, is 9.182 g/cm3. The mineral is cubic, space group F-43m, with a = 10.8215(5) Å and Z = 16. Although tsikourasite is similar in composition to those of monipite (MoNiP), polekhovskyite (MoNiP2), and the synthetic compound MoNiP2, all these phases are hexagonal and not cubic like tsikourasite. It exhibits the same structure as the cubic Mo3Ni2P1.18 compound [space group F-43m, a = 10.846(2) Å] synthesized at 1350 °C. The mineral and its name have been approved by the Commission of New Minerals, Nomenclature and Classification of the International Mineralogical Association (No. 2018-156). The mineral honors Professor Basilios Tsikouras of the Universiti Brunei Darussalam.

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Zuktamrurite, FeP2, a new mineral, the phosphide analogue of löllingite, FeAs2

Cited by 29 publications

References 55 publications

Cyclophosphates, a new class of native phosphorus compounds, and some insights into prebiotic phosphorylation on early Earth

Cyclophosphates, a new class of native phosphorus compounds, and some insights into prebiotic phosphorylation on early Earth

In Situ Induction of Strain in Iron Phosphide (FeP₂) Catalyst for Enhanced Hydroxide Adsorption and Water Oxidation

Tsikourasite, Mo3Ni2P1+x (x < 0.25), a New Phosphide from the Chromitite of the Othrys Ophiolite, Greece

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Zuktamrurite, FeP2, a new mineral, the phosphide analogue of löllingite, FeAs2

Cited by 29 publications

References 55 publications

Cyclophosphates, a new class of native phosphorus compounds, and some insights into prebiotic phosphorylation on early Earth

Cyclophosphates, a new class of native phosphorus compounds, and some insights into prebiotic phosphorylation on early Earth

In Situ Induction of Strain in Iron Phosphide (FeP2) Catalyst for Enhanced Hydroxide Adsorption and Water Oxidation

Tsikourasite, Mo3Ni2P1+x (x < 0.25), a New Phosphide from the Chromitite of the Othrys Ophiolite, Greece

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In Situ Induction of Strain in Iron Phosphide (FeP₂) Catalyst for Enhanced Hydroxide Adsorption and Water Oxidation