Polymorphism In M(H2po2)(3) (M = V, Al, Ga) Compounds With The Perovskite-Related Reo3 Structure

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.