Synthesis and crystal structure of the new vanadate AgCaVO4: Comparison with the arcanite structure

Gwilherm Nénert 1
  • 1 PANalytical B. V., Lelyweg 1, 7602 EA, Almelo, Netherlands
Gwilherm Nénert

Abstract

We 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.

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Zeitschrift für Kristallographie – Crystalline Materials offers a place for researchers to present results of their crystallographic studies. The journal includes theoretical as well as experimental research. It publishes Original Papers, Letters and Review Articles in manifold areas of crystallography.

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