Crystal structure of KSb2PO8

KSb₂PO₈ crystallizes in the monoclinic system, space group Co, with $\text{a}\text{= 12.306(4)}\text{A}\text{?}$, $\text{b}\text{= 7.086(2)}\text{A}\text{?}$, $\text{c}\text{= 15.037(5)}\text{A}\text{?}$, β = 95.82(3)°, Z = 8. The structure was determined from 2149 reflexions collected on a NONIUS CAD4 automatic diffractometer with MoK$\text{}\text{?}$ga radiation. The final R index and weighted R_w index are 0.019 and 0.025 respectively. The structure is built up from SbO₆ octahedra sharing corners or edges and PO₄ tetrahedra sharing corners with octahedra to form a three-dimensional network. The potassium atoms are situated in the interconnected channellike cavities.