2 3-DIMENSIONAL TETRAHEDRAL FRAMEWORK ZINC PHOSPHATES WITH INFINITE ZN-O-ZN CHAINS - H[ZN-4(PO4)(3)]H2O AND [ZN-4(H2O)(PO4)(3)] NH(CH3)(3)

Two zinc phosphates materials (ZnPO-W and ZnPO-TMA), both containing i nfinite Zn-O-Zn chains as part of the three-dimensional framework have been prepared by hydrothermal methods and characterized by single-cry stal X-ray diffraction. ZnPO-W has one six-ring channel and one eight- ring channel (six or eight refers to the number of tetrahedral atoms f orming the rings) along the a-axis with water molecules in channels. Z nPO-TMA has two different eight-ring channels also along the a-axis wi th trimethylammonium cations located within channels. ZnPO-W was also studied with the thermogravimetry and its decomposition products at 60 0 and 1000 degrees C were identified with X-ray powder diffraction. Cr ystal data for H[Zn-4(PO4)(3)]H2O (ZnPO-W), M = 565.42, space group <P (1)over bar>, a = 5.0549(9), b = 9.624(2), c = 13.158(2), alpha = 101. 007(1) degrees, beta = 100.942(1) degrees, gamma = 103.606(1) degrees, V = 591.9(8) Angstrom(3), Z = 2, D-c = 3.17 gcm(-3), clear needle, Mo K alpha, lambda = 0.71073 Angstrom mu = 8.68 mm(-1), 2 theta(max) = 60 degrees R = 3.56 %, wR = 3.81 %, GOF = 0.999 for 180 parameters and 3 226 unique reflections with I > 3.0 sigma(I). Crystal data for [Zn-4(H 2O)(PO4)(3)] NH(CH3)(3) (ZnPO-TMA), M = 624.53, space group <P(1)over bar>, a = 5.304(2), b = 9.296(3), c = 15.474(5), alpha = 86.462(1) deg rees, beta = 86.420(2) degrees, gamma = 78.906(2) degrees, V = 746.4(4 ) Angstrom(3), Z = 2, D-c = 2.78 gcm(-3), clear thin needle, MoK alpha , lambda = 0.71073 Angstrom, mu = 6.90 mm(-1), 2 theta(max) = 60 degre es, R = 5.75 %, wR = 4.07 %, GOF = 1.01 for 214 parameters and 2992 un ique reflections with I > 3.0 sigma(I). (C) 1996 Academic Press,Inc.