[ Top ] [ Japanese ]

Akatoreite

Year of discovery: 1969 (Akatore creek, New Zealand), 2000 (Japan)

Locality list: 0 localities of akatoreite

• Mn₉Al₂Si₈O₂₄(OH)₈
• (Mn²⁺,Fe²⁺)₉Al₂Si₈O₂₄(OH)₈
• [Mn²⁺₉][Al³⁺₂][(OH)₆|(HSi₄O₁₃)₂]^24-

• Class: Sorosilicate - Hydroxide

• Color: Brown
• Streak: Pale yellowish Brown
• Luster: Vitreous
• Diaphaneity: Transparent

• Habit: Prismatic, Fibrous elongated to [100]
• Aggregate: Radial
• Twin: {0-21}

• Cleavage: Perfect on {010} (1 plane), Imperfect on {0-12} (1 plane)
• Hardness: 6
• Density: 3.5

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=8.3, b=10.4, c=7.6, α=104.5, β=93.8, γ=104.2

Etymology: Akatore creek, New Zealand