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definition Feldspars (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8) are a group of rock-forming tectosilicate minerals that make up as much as 60% of the Earth's crust. more like this
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Feld more like this
source more like this
Resource original
Concept original
broader original
narrower feldspar original
in scheme commodity-code original
is primary topic of feldspar