Abstract
A novel two-dimensional layered iron(II) phosphate, NaFeII2(PO4)(HPO4), has been synthesized under mild hydrothermal conditions. Its structure was determined by single-crystal X-ray diffraction and further characterized by FTIR, elemental analysis, inductively coupled plasma (ICP) analysis, powder X-ray diffraction, and magnetic susceptibility measurements. Its anionic network is based on strictly alternating FeIIO4 tetrahedral units and P-centered units including PO4 and PO3(OH) tetrahedra linked through their vertices to form a double layered structure that contains columns of double six-membered rings and 1D tubes by four-membered rings sharing faces. The sodium atoms reside in the interlayer region. The title compound crystallizes in the triclinic system, space group P1, with the following cell parameters: a = 5.1200(10) A; b = 8.6232(17) A; c = 8.7958(18) A; α = 96.93(3)°; β = 100.45(3)°; γ = 105.75(3)°; V = 361.58(12) A3; Z = 2; Dc = 2.991 Mg/m3.
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