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Clinohumite [abbr. Chu ]

Year of discovery: 1876 (Monte Somma, Italy), 1934 (Japan)

Locality list: 27 localities of clinohumite

• Mg₉(SiO₄)₄F₂
• (Mg,Fe²⁺)₉(SiO₄)₄(F,OH)₂
• [Mg²⁺₉][F₂|(SiO₄)₄]^18-

• Class: Humite group
• Class: Nesosilicate - Fluoride

• F => OH: Hydroxylclinohumite

• Color: Orange, Reddish brown, White
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Indistinct on {001} (1 plane)
• Hardness: 6
• Density: 3.1

• System: Monoclinic
• Group: 2/m, P2₁/c
• Lattice: a=13.7, b=4.8, c=10.3, β=100.8