[ Top ] [ Japanese ]

Norrishite

Year of discovery: 1989 (Hoskins mine, Australia), 2013 (Japan)

Locality list: A locality of norrishite

• KLiMn₂Si₄O₁₂
• [K⁺][Li⁺][Mn³⁺₂][O₂|Si₄O₁₀]^8-

• Class: Phyllosilicate - Oxide
• Radioactive: Very weak

• Color: Dark brown, Black
• Streak: Pale brown
• Luster: Sub-Metallic
• Diaphaneity: Translucent

• Cleavage: Perfect on {001} (1 plane), Poor on {100} and {010} (2 planes)
• Hardness: 2.5
• Density: 3.3

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=5.3, b=8.9, c=10.0, β=98.2