AbstractWe report the synthesis and the crystal structure of the new vanadate AgCaVO4 from laboratory powder X-ray data. Contrary to the previously reported AgBVO4 (B=Mg, Cd), AgCaVO4 exhibits the arcanite structure (β-K2SO4). Although it exhibits the same structure than arcanite, significant differences are observed. These differences are explained by deriving the atomic displacement field. The change of connectivity within the structure between β-K2SO4 and AgCaVO4 results from a rotation of the VO4 tetrahedra giving rise to a change from a face sharing to an edge sharing octahedral chains. Additionally, the thermal expansion of AgCaVO4 has been investigated up to 800°C.
Zeitschrift für Kristallographie - Crystalline Materials – de Gruyter
Published: Oct 26, 2017
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