A note on the 01 spacing of some lime-rich alkali feldspars from Kangerdlugssuaq, East Greenland
- 14 March 1966
- journal article
- Published by Mineralogical Society in Mineralogical Magazine and Journal of the Mineralogical Society
- Vol. 35 (273) , 704-714
- https://doi.org/10.1180/minmag.1966.035.273.05
Abstract
SummaryThe values of 2θ 01 for some homogenized lime-rich fine microperthites from the Kangerdlugssuaq alkaline intrusion, East Greenland, are investigated and found to be consistently high when compared with the values used in the standard curves for estimating the Or content of alkali feldspars. This deviation, which is approximately proportional to anorthite content, results in anomalously low Or percentages being obtained and is ascribed to a distortion of the structure due to the unusually high calcium content of the microperthites.Keywords
This publication has 7 references indexed in Scilit:
- The Feldspathic Syenites of the Loch Ailsh Intrusion, Assynt, ScotlandJournal of Petrology, 1965
- The form and internal structure of the alkaline Kangerdlugssuaq intrusion, East GreenlandMineralogical Magazine and Journal of the Mineralogical Society, 1965
- The lattice parameters of high-temperature triclinic sodic feldsparsMineralogical Magazine and Journal of the Mineralogical Society, 1964
- Transitional cryptoperthitesActa Crystallographica, 1961
- Zur röntgenographischen Bestimmung von AlkalifeldspätenThe Science of Nature, 1961
- Crystallisation of Feldspars in LarvikitesZeitschrift für Kristallographie, 1956
- The System NaAlSi3O8-KAlSi3O8-H2OThe Journal of Geology, 1950