A new layered iron fluorophosphate

A new iron fluorophosphate of the composition, [C6N4H21] [Fe2F2(HPO4)(3)][H2PO4](.)2H(2)O, I has been prepared by the hydrothermal route. This compound contains iron fluorophosphate layers and the H2PO4- anions are present in the interlayer space along with the protonated amine and water molecules. The compound crystallizes in the monoclinic space group P2(1)/c. (a = 13-4422(10) Angstrom, b = 9 7320(10) Angstrom, c = 18-3123(3) Angstrom, beta = 92-1480degrees, V = 2393-92(5) Angstrom 3, Z = 4, M = 719-92, d(calc). = 1.997 g cm(-3), R-1 = 0.03 and wR(2) = 0,09).