INTERRUPTED SUPER FRAMEWORK OF THE CRYSTAL STRUCTURE OF Cs[Be2(PO4)(PO4H)] CESIUM DIBERYLLIUM PHOSPHATE HYDROPHOSPHATE
V. V. Bakakin, Y. V. Seretkin, S. P. Demin
Keywords: crystal structure, cesium beryllium phosphate, para framework, super framework
Pages: 369-373
Abstract
The crystal structure of cesium diberyllium phosphate hydrophosphate Cs[Be2(PO4)(PO4H)] obtained hydrothermally is analyzed. Unit cell parameters are: a = 4.8860(5) Å, b = 10.7330(11) Å, c =
13.0061(15) Å, α = 92.540(10)°, β = 92.451(9)°, γ = 90.948(9)°, space group P 1. In the structural motif consisting of РО4 and ВеО4 tetrahedra, Ве,Р two-link chains and ribbons are distinguished, typical of a short a-translation of ≈4.9 Å. The presence of ternary and terminal O ligands along with bridging ones determines the term interrupted super framework. The group of two Ве tetrahedra with a common edge is detected for beryllium phosphates for the first time.
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