Normalscliwingungen von Alkalifeldspäten
- 1 January 1977
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Kristallographie - Crystalline Materials
- Vol. 146 (1-3) , 1-18
- https://doi.org/10.1524/zkri.1977.146.1-3.1
Abstract
The normal modes of vibration of various alkali feldspars were calculated on the basis of a simple harmonic valence force field. Infrared and Raman spectra were recorded over the whole frequency range. With 7 force constants for ordered feldspars and 5 constants for disordered feldspars the calculated frequencies could be fitted with an average deviation of 10–16 cm−1, depending on the compound. The fitting was done by a least-squares method. The model used cannot explain the frequency shifts which are observed in going from an ordered to a disordered Si/Al distribution.Keywords
This publication has 2 references indexed in Scilit:
- The force field of K feldsparZeitschrift für Kristallographie - Crystalline Materials, 1971
- Ordnung/Unordnung und Ultrarotabsorption II. Variation der Lage und Intensität einiger Absorptionen von Feldspäten. Zur Struktur von Orthoklas und AdularZeitschrift für Kristallographie, 1957