(Fe,Ni)₂P allabogdanite can be an ambient pressure phase in iron meteorites.

ABSTRACT: An orthorhombic modification of (Fe,Ni)₂P, allabogdanite, found in iron meteorites was considered to be thermodynamically stable at pressures above 8 GPa and temperatures of 1673 K according to the results of recent static high-pressure and high-temperature experiments. A hexagonal polymorphic modification of (Fe,Ni)₂P, barringerite, was considered to be stable at ambient conditions. Experimental investigation through the solid-state synthesis supported by ab initio calculations was carried out to clarify the stability fields of (Fe,Ni)₂P polymorphs. Both experimental and theoretical studies show that Fe₂P-allabogdanite is a low-temperature phase stable at ambient conditions up to a temperature of at least 773 K and, therefore, is not necessarily

SUBMITTER: Litasov KD 

PROVIDER: S-EPMC7265559 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature