The low-temperature barium fluoridozirconate variety α-BaZr₂F₁₀

Abstract

The low-temperature triclinic variety -BaZr 2 F 10 constitutes a new structure type, less symmetrical than the higher-temperature -variety. It is based on the stacking of double sheets of Zr polyhedra, connecting three different kinds of ZrF 7 polyhedra and one ZrF 8 polyhedron via vertices and edges, separated by corrugated Ba 2+ layers. It is compared to the high-temperature -variety, directly recrystallizing from barium fluoridozirconate glass, and also to BaTe 2 F 10 and KTe 2 F 9 .

Ba4YZr3F23and Ba4LnZr3F23: a new noncentrosymmetric potential host structure type for optical devices

“…The binary system BaF 2 -ZrF 4 (Laval & Frit, 1979;Ratnikova et al, 1980Ratnikova et al, , 1997Grande et al, 1992) presents a glass domain, a solid solution of the fluorite type and phases BaZrF 6 (three structure types: Laval et al, 1974;Mehlhorn & Hoppe, 1976;Le Bail & Mercier, 1992), Ba 2 ZrF 8 (two structure types: Laval & Frit, 1980;Le Bail & Laval, 1998), Ba 3 ZrF 10 (Laval & Frit, 1979) and BaZr 2 F 10 (two structure types: Laval et al, 1988;Laval, 2019).…”