Zur Kristallstruktur von Natriumnitrat
- 1 January 1978
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Kristallographie
- Vol. 148 (1-2) , 101-105
- https://doi.org/10.1524/zkri.1978.148.1-2.101
Abstract
From exact intensity measurements of the X-ray reflections on NaNO 3 single-crystal-plates was derived by difference-Fourier- and least-squaresmethods that the NO 3 − -ions form flat pyramides. In the hexagonal cell the oxygen atoms are shifted in z-direction by 0.1 Å and turned round the 3-fold axis by the angle of 2.6° from the special position in the calcit structure. The N–O-bondlength is increased from 1.217 Å to 1.254 Å. There are two possible positions for the oxygen atoms which are connected by the 2-fold axis. They are occupied statistically and so the space-group R [unk] c must not be changed. During the shift the distances of the oxygen atoms to their neighboured Na + -ions remain nearly constant.Keywords
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