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Clinojimthompsonite

Year of discovery: 1978 (Carlton mine, USA), 1981 (Japan)

Locality list: 2 localities of clinojimthompsonite

• Mg₅Si₆O₁₆(OH)₂
• (Mg,Fe)₅Si₆O₁₆(OH)₂
• [Mg²⁺₅][(HSi₃O₉)₂]^10-

• Class: Jimthompsonite group
• Class: Inosilicate (Single chain)

• Polymorph: Jimthompsonite (Orthorhombic)

• Color: Colorless, Brown
• Streak: White
• Luster: Silky
• Diaphaneity: Transparent-Translucent

• Cleavage: Good
• Hardness: 2-2.5
• Density: 3.0

• System: Monoclinic
• Group: 2/m, C2/c
• Lattice: a=9.9, b=27.2, c=5.3, β=109.5