Synthesis and Characterization of a Three-Dimensional Gallium Phosphate, [NH3(CH2)4NH3][Ga4(HPO4)(PO4)4],

A new three-dimensional gallium phosphate, [NH3(CH2)4NH3][Ga4(HPO4)(PO4)4], has been synthesized under solvothermal conditions at 433 K in the presence of 1,4-diaminobutane and its structure determined using room-temperature single-crystal Xray diffraction data (Mr=844.91, monoclinic, space groupP21,a=5.0404(2),b=22.738(3),c=9.2968(9) ?,BETA=103.800 (6)°;V=1034.72 ?3,Z=2,R=2.77%, andRw=3.13% for 2053 observed data (I>3(SIGMA(I))). The structure consists of GaO4and PO4tetrahedra and GaO5trigonal bipyramids linked to generate an open three-dimensional framework containing 4-, 8-, and 12-membered rings of alter- nating gallium and phosphorus-based polyhedra. 1,4-Diamino- butane dications reside in the two-dimensional pore network and are hydrogen-bonded to the inorganic framework.