Hydrothermal synthesis of new berylloborophosphates MIBeBPO (MI=K+, Na+ and NH4+) with zeolite ANA framework topology

A novel family of berylloborophosphates, (MBeBPO)-Be-I (M-I = K+, Na+ and NH4+) with the zeolite analcime (ANA) framework topology has been hydrothermally synthesized by using monovalent cations as the templates. The structure of KBeBP2O8 . 1/3H(2)O (K-BBP-ANA) was solved by single-crystal X-ray diffraction and crystal data for K-BBP-ANA are: M = 254.19, cubic, space group: P2(1)3, a = 12.427(6) Angstrom, V = 1919.0(17) Angstrom(3), Z = 12, R-1 = 0.0768, Rw = 0.1842. The compound is the first BeBPO4 phase with zeolite-ANA structure, which is built of corner-sharing BeO4, BO4, and PO4 tetrahedra. K-BBP-ANA has three-dimensional distorted eight-ring channels along the crystallographic [1 0 0], [0 1 0] and [0 0 1] directions. The framework charges of BBP-ANA are balanced by the monovalent cations in the channel. The X-ray powder diffraction patterns show the family of (MBeBPO)-Be-I (M-1 = K+, Na+ and NH4+) are isostructural and their framework structures are thermally stable up to 800 degreesC. (C) 2002 Elsevier Science Inc. All rights reserved.