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Nekrasovite

Year of discovery: 1984 (Kairagach deposit, Uzbekistan), 2002 (Japan)

Locality list: 2 localities of nekrasovite

• Cu₂₆V₂Sn₆S₃₂
• Cu₂₆V₂(Sn,As,Sb)₆S₃₂
• [(Cu⁺,Cu²⁺)₂₆][V³⁺₂][Sn⁴⁺₆][S₃₂]

• Class: Colusite group
• Class: Sulfide

• Sn => As: Colusite
• Sn => Ge: Germanocolusite
• Sn => Sb: Stibiocolusite
• Sn => V: Sulvanite

• Color: Pale brown
• Luster: Metallic
• Diaphaneity: Opaque

• Hardness: 4.5
• Density: 4.6

• System: Cubic
• Group: (-4)3m, P(-4)3n
• Lattice: a=10.7

Etymology: I. Y. Nekrasov, Russian mineralogist