The lattice parameters of high-temperature triclinic sodic feldspars
- 1 September 1964
- journal article
- Published by Mineralogical Society in Mineralogical Magazine and Journal of the Mineralogical Society
- Vol. 33 (266) , 949-962
- https://doi.org/10.1180/minmag.1964.033.266.03
Abstract
The lattice parameters of twenty calcium-bearing anorthoclases and potassium-bearing acid plagioclases have been determined by powder methods. The 201̄ spacing of the homogenized anorthoclases gives a good measure of the Or content irrespective of the amount of calcium present ; this spacing combined with α* (010): (001) may be used to determine the ternary composition of homogeneous feldspars more potassic than approximately Or15. The lattice parameters of feldspars less potassic than Or15 cannot be used for the determination of their ternary composition.Keywords
This publication has 2 references indexed in Scilit:
- Pantelleritic liquids and their phenocrystsMineralogical Magazine and Journal of the Mineralogical Society, 1962
- The feldspar phenocrysts of some Tertiary acid glassesMineralogical Magazine and Journal of the Mineralogical Society, 1960