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Momoiite

Year of discovery: 2010 (Japan as the first occurence in the World)

Locality list: 4 localities of momoiite

• Mn₃V₂(SiO₄)₃
• (Mn,Ca)₃(V,Al)₂(SiO₄)₃
• [Mn²⁺₃][V³⁺₂][(SiO₄)₃]^12-

• Class: Ugrandite subgroup < Garnet group < Garnet supergroup
• Class: Nesosilicate

• Mn => Ca: Goldmanite

• V => Al: Spessartine
• V => Fe: Calderite

• Color: Green
• Streak: Dull green
• Luster: Vitreous
• Diaphaneity: Translucent

• System: Cubic
• Group: m3m, Ia(-3)d
• Lattice: a=11.9

Etymology: Prof. Hitoshi Momoi (1930-2002), Japanese mineralogist of Ehime University.