chromphyllite
nounEtymology For its composition of (CHROM)ium and its micaceous cleavage, Ancient Greek φύλλον (phúllon, “leaf”) + -ite.
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Chemistry, Geography, Geology, Mineralogy, Natural sciences, Physical sciences A monoclinic-prismatic emerald green mineral containing aluminum, barium, chromium, fluorine, hydrogen, oxygen, potassium, and silicon.