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Chromphyllite

Year of discovery: 1995 (Pokhabikha river valley, Russia), 1993 (Japan)

Locality list: A locality of chromphyllite

• KCr₂AlSi₃O₁₀(OH)₂
• (K,Ba)(Cr,Al)₂AlSi₃O₁₀(OH,F)₂
• [K⁺][Cr³⁺₂][(OH)₂|AlSi₃O₁₀]^7-

• Class: Dioctahedral < True mica group < Mica supergroup
• Class: Phyllo-Aluminosilicate - Hydroxide

• Cr => Al: Muscovite

• CrAl => MgSi: Chromceladonite

• Color: Green
• Streak: Pale green
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 3
• Density: 2.9

• System: Monoclinic
• Group: 2/m, C2c
• Lattice: a=5.3, b=9.1, c=20.5, β=95.6