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Tetrahedral framework structures with topologies that show close relationships to the feldspar group or to gismondine are formed by the zincoborophosphates A[ZnBP(2)O(8)] (see picture). The compounds are readily accessible under mild hydrothermal conditions (T(max)=170 degrees C) and are thermally remarkably stable (for example, 940 degrees C for A=Cs). Metalloborophosphates are a new class of compounds, which are expected to provide access to zeolite-like microporous systems.
Kniep
R
Eduard-Zintl-Institut der Technischen Universität, D-64289 Darmstadt (Germany).
Schäfer
G
Engelhardt
H
Boy
I