Über die Gestalt von BO3-Gruppen
Author:
- Erich ZobetzEZErich Zobetz
- 1 January 1982
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Kristallographie
- Vol. 160 (1-2) , 81-92
Abstract
The frequency distributions of some important geometrical quantities of 75 BO 3 -groups with estimated standard deviations of d (B ∓ O) of 0.005 Å or less are presented and discussed. The following mean values and spreads have been obtained: [unk](B ∓ O) 225 = 1.370(19) Å, [unk](O ∓ B ∓ O) 225 = 120.0(2.9)°. The deviations from planarity for about 20 of these 75 BO 3 -groups are small but nevertheless experimentally well established. The extreme values of Δ (distance of the B-atom from the oxygen plane) are 0.035 Å. In the few cases where a fourth relatively close (2.7 ∓ 3.0 Å) oxygen lies vertically above the B-atom of the BO 3 -group, there exists a dependence of magnitude and direction of the deviation on the distance d (B ∓ 4 th O).Keywords
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