Potassium Cobalt Aluminium Mixed Phosphate, K(Co^II,Al)₂(PO₄)₂

The framework of K(Co^II,Al)₂(PO₄)₂ consists of corner-sharing (Co/Al)O₄ and PO₄ tetrahedra, which form large intersecting tunnels running along the three crystallographic axes, with the K atoms situated in the tunnels. Co^II and Al atoms are distributed over two tetrahedral sites with almost equal probability. The average Co(1)/Al(1)-O distance of 1.826 (19) Å and Co(2)/Al(2)-O distance of 1.829 (13) Å reflect mixing of Co and Al at these atomic sites.

-1