M⁺M³⁺₂As(HAsO₄)₆ (M⁺M³⁺ = TlGa, CsGa, CsAl): three new metal arsenates containing AsO₆ octa-hedra.

ABSTRACT: The crystal structures of hydro-thermally synthesized (T = 493 K, 7 d) thallium(I) digallium arsenic(V) hexa-kis-[hydrogenarsenate(V)], TlGa₂As(HAsO₄)₆, caes-ium digallium arsenic(V) hexa-kis-[hydrogenarsenate(V)], CsGa₂As(HAsO₄)₆, and caesium dialuminium arsenic(V) hexa-kis-[hydrogenarsenate(V)], CsAl₂As(HAsO₄)₆, were solved by single-crystal X-ray diffraction. The three compounds are isotypic and adopt the structure type of RbAl₂As(HAsO₄)₆ (Rc), which itself represents a modification of the RbFe(HPO₄)₂ structure type and consists of a tetra-hedral-octa-hedral framework in which the slightly disordered M⁺

SUBMITTER: Schwendtner K 

PROVIDER: S-EPMC6073012 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature