| Abstract: | Potassium cobalt hydrogenpyrophosphate dihydrate, KHCoP2O7·2H2O, crystallizes in the orthorhombic space group Pnma. This salt is isotypic with KHMP2O7·2H2O (M = Mn and Zn). The structure consists of alternating layers, built from HP2O73? acidic pyrophosphate groups and CoO6 octahedra, joined by potassium ions and bridging hydrogen bonds. The Co, K and water O atoms lie on mirror planes. The pyrophosphate group consists of two symmetry‐related PO4 groups, with the bridging O atom on a mirror plane. |
