phosphophyllite

noun

phos·​pho·​phyllite

ˌfäsfō+

: a mineral Zn₂(FeMn)(PO₄)₂.4H₂O consisting of a hydrous phosphate of zinc, ferrous iron, and manganese and forming colorless or pale blue monoclinic crystals with perfect micaceous cleavage (hardness 3–4, specific gravity 3.1)

Word History

Etymology

phosph- + phyllite

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