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Mangano-mangani-ungarettiite

Year of discovery: 1995 (Hoskins mine, Australia)

Locality list:

• NaNa₂Mn₅Si₈O₂₄
• [Na⁺][Na⁺₂][Mn²⁺₂][Mn³⁺₃][O₂|(Si₄O₁₁)₂]^16-

• Class: w(O)-dominant amphibole group < Amphibole supergroup
• Class: Inosilicate (Double chain) - Oxide

• Na => K: Potassic-mangano-mangani-ungarettiite

• Color: Dark red
• Streak: Pale pink
• Luster: Vitreous
• Diaphaneity: Tranlucent

• Habit: Acicular, Prismatic

• Cleavage: Perfect on {110} (2 planes, 120 degree)
• Hardness: 6
• Density: 3.5

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=9.9, b=18.0, c=5.3, β=105.9