Assertion: biotite's magnesium impurity | /r/CapableOf | substitute for octahedral aluminum
Facets:
Source sentences:
text: Biotite is the most common of the micas, containing iron and/or magnesium impurities substituting for octahedral aluminum.
text: Biotite is the most common of the micas, containing iron and/or magnesium impurities substituting for octahedral aluminum.
text: Biotite is the most common of the micas, containing iron and/or magnesium impurities substituting for octahedral aluminum.
text: Biotite is the most common of the micas, containing iron and/or magnesium impurities substituting for octahedral aluminum.