Polymorphism in M(H2PO2)3 (M = V, Al, Ga) compounds with the perovskite-related ReO3 structure

Hayden A Evans; Zeyu Deng; Ines E Collings; Yue Wu; Jessica L Andrews; Kartik Pilar; Joshua M Tuffnell; Guang Wu; John Wang; Siân E Dutton; Paul D Bristowe; Ram Seshadri; Anthony K Cheetham

doi:10.1039/c9cc00118b

Polymorphism in M(H₂PO₂)₃ (M = V, Al, Ga) compounds with the perovskite-related ReO₃ structure

Chem Commun (Camb). 2019 Mar 5;55(20):2964-2967. doi: 10.1039/c9cc00118b.

Authors

Hayden A Evans¹, Zeyu Deng, Ines E Collings, Yue Wu, Jessica L Andrews, Kartik Pilar, Joshua M Tuffnell, Guang Wu, John Wang, Siân E Dutton, Paul D Bristowe, Ram Seshadri, Anthony K Cheetham

Affiliation

¹ Department of Chemistry and Biochemistry, University of California Santa Barbara, California 93106, USA.

PMID: 30778470
DOI: 10.1039/c9cc00118b

Abstract

Trivalent metal hypophosphites with the general formula M(H2PO2)3 (M = V, Al, Ga) adopt the ReO3 structure, with each compound displaying two structural polymorphs. High-pressure synchrotron X-ray studies reveal a pressure-driven phase transition in Ga(H2PO2)3 that can be understood on the basis of ab initio thermodynamics.