Synthesis and crystal structures of iron hydrogen phosphates†
Abstract
Three new iron hydrogen phosphate compositions have been synthesised under hydrothermal conditions; Fe(II)2O(HPO4) (1), (NH4)3Fe(III)3(HPO4)6 (2) and Fe1.34(III)(PO4)OH0.96 (3). 1 and 2 have framework structures constructed from FeO6 octahedra and HPO4/PO4 tetrahedra containing cavities; in the case of 2, these are occupied by ammonium