Hydrothermal synthesis and structure of the new three-dimensional fluorogallophosphate JGP-4 with a Ga/P ratio of 7/8

A new 3-D fluorogallophosphate Ga7P8O32F4(C6H20N4)(2)(.)3H(3)O(+.)H(2)O (denoted JGP-4) with a Ga/P ratio of 7/8 has been synthesized hydrothermally by using triethylenetetramine as the template. It crystallizes in the tetragonal, space group P (4) over bar2(1)c (no. 114), with a = 15.461(2) b = 15.461(2); c = 9.3233(1) Angstrom, V = 2228.67(5) Angstrom(3) and Z = 2. This is the first metal phosphate with a M/P ratio of 7/8. The 3-D anionic framework of JGP-4 is built up from the vertex linkage of the 1-D chains and Ga5P4 building units, forming a 3-D open-framework with 8-membered and four square 4-membered rings along the c-axis direction. (C) 2004 Elsevier Inc. All rights reserved.