Flux syntheses and single-crystal structures of CsNa₁₀ M ₄(AsO₄)₉ (M = Zr, Hf).

ABSTRACT: The isostructural compounds caesium deca-sodium tetra-zirconium nona-arsenate, CsNa₁₀Zr₄(AsO₄)₉, and caesium deca-sodium tetra-hafnium nona-arsenate, CsNa₁₀Hf₄(AsO₄)₉, arose as unexpected single-crystal products from the reactions of Na₂CO₃, MO₂ (M = Zr, Hf) and As₂O₅ in a eutectic flux of NaCl and CsCl. They consist of MO₆ octa-hedra and AsO₄ tetra-hedra sharing vertices to generate three-dimensional polyhedral networks encapsulating the caesium and sodium ions. The MO₆ groups share all their vertices with adjacent As atoms but the As atoms have one or two 'terminal' O atoms not bonded to Zr or Hf. The

SUBMITTER: Harrison WTA 

PROVIDER: S-EPMC9260365 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature