The determination of composition and thermal history of plagioclase by the X-ray powder method
- 1 June 1955
- journal article
- Published by Mineralogical Society in Mineralogical Magazine and Journal of the Mineralogical Society
- Vol. 30 (229) , 648-656
- https://doi.org/10.1180/minmag.1955.030.229.05
Abstract
In a recent paper (hereafter referred to as GD) Goodyear and Dufiln (1954) described X-ray powder data for a number of synthetic and chemically analysed plagioclases of composition An0Abl00-Anl00Ab0. Important aspects of this work were a correlation of the X-ray patterns with chemical composition, and a distinction between the pattern of a naturally occurring material of low-temperature origin and that of a synthetic of similar composition. The investigation showed quite clearly that the unit-cell dimensions of a synthetic plagioelase depend but little on composition from An0Abl00 to An70Ab30, whilst they differ from those of the low-temperature modification greatly for albite, to a lessening degree as the composition approaches An70Ab30, and practically not at all in the range An70Ab30-Anl00Ab0.Keywords
This publication has 5 references indexed in Scilit:
- Long-range-short-range order in calcic plagioclases as a continuous and reversible function of temperatureActa Crystallographica, 1954
- On the use of Calcic Plagioclases in Geologic ThermometryThe Journal of Geology, 1954
- The identification and determination of plagioclase felspars by the X-ray powder methodMineralogical Magazine and Journal of the Mineralogical Society, 1954
- The structures of the plagioclase felspars. IActa Crystallographica, 1951
- High-Temperature Albite and Contiguous FeldsparsThe Journal of Geology, 1950