Assertion: calcium anorthite | /r/HasProperty | oligoclase
Facets:
Source sentences:
text: For example, the plagioclase feldspars comprise a continuous series from sodium-rich end member albite (NaAlSi 3 O 8 ) to calcium-rich anorthite (CaAl 2 Si 2 O 8 ) with four recognized intermediate varieties between them (given in order from sodium- to calcium-rich): oligoclase, andesine, labradorite, and bytownite.