Zircophyllite

Zircophyllite is a complex mineral, formula (K,Na)₃(Mn,Fe)₇(Zr,Ti,Nb)₂Si₈O₂₄(OH,F)₇. It crystallizes in the triclinic - pinacoidal crystal class as dark brown to black micaceous plates. It has perfect 001 cleavage, a Mohs hardness of 4 to 4.5 and a specific gravity of 3.34. Its indices of refraction are nα=1.708 nβ=1.738 nγ=1.747 and it has a 2V optical angle of 62°.

单词	Zircophyllite
释义	Zircophyllite 英语百科 Zircophyllite Zircophyllite is a complex mineral, formula (K,Na)₃(Mn,Fe)₇(Zr,Ti,Nb)₂Si₈O₂₄(OH,F)₇. It crystallizes in the triclinic - pinacoidal crystal class as dark brown to black micaceous plates. It has perfect 001 cleavage, a Mohs hardness of 4 to 4.5 and a specific gravity of 3.34. Its indices of refraction are nα=1.708 nβ=1.738 nγ=1.747 and it has a 2V optical angle of 62°.
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