beargonewild
Posts: 22716
Joined: 5/7/2007 Status: offline
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quote:
I'm a bit rusty but there's 2 gropus futher sub divided into 9 types. Plagioclase: Albite, Oligoclase, Andesine, Labradorite, Bytownite, Anorthite K-Feldspars are: Microcline, Sanidine and Orthoclase quote:
ORIGINAL: BossyShoeBitch quote:
ORIGINAL: beargonewild quote:
ORIGINAL: BossyShoeBitch That's what i remembered as well.. you threw me off with the 3 different types... I was thinking about the three more commonly found plagioclase, oglioclase and microclines. but isn't oglioclase a type of plaglioclase? and microlines are a type of alkalis aren't they? or are you saying that of the two types, oglioclase and microlines are the most common? If I recall correctly, Oglioclase is a type of plagioclase feldspar. Microcline and Orthoclase are two types of K-feldspars as the primary component is potassium mixed with other impurities.
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