Der Einfluß der Al, Si-Verteilung auf die Mischungslücke der Alkalifeldspäte

✍ Scribed by Gerd Müller

• Book ID: 104747376
• Publisher: Springer
• Year: 1971
• Tongue: English
• Weight: 411 KB
• Volume: 34
• Category: Article
• ISSN: 0010-7999
• DOI: 10.1007/bf00376032

✦ Synopsis

A series of Na-and K-feldspars with stepwise decreasing A1, Si-order has been prepared by heat treatment at high temperature and the alkali exchange technique. A series of solvi attributable to the different structural states has been determined by homogenisation experiments. It is shown that the crest and the width of the solvi decreases continuously with decreasing A1, Si-order, the mierocline-low albite and sanidine-high albite solvi being the extreme limits. This result is substantiated by some analogous experiments with natural and synthetic alkali feldspars of intermediate A1, Si-order.