Abstract
A new non-centrosymmetrical form of lithium molybdyl arsenate has been synthesized and grown as a single crystal. The structure of β-LiMoO2(AsO4) is built up of corner-sharing AsO4 tetrahedra and MoO6 octahedra which form a three-dimensional framework containing tunnels running along the a axis, wherein the Li+ cations are located. This novel structure is compared with the compound LiMoO2(AsO4) of the same formula, and with those of AMO2(XO4) (A is Na, K, Rb or Pb, M is Mo or V, and X is P or As) and B(MoO2)2(XO4)2 (B is Ba, Pb or Sr).
