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Vésigniéite, Vesignieite

Year of discovery: 1955 (Glücksstern, Germany)

Locality list:

• BaCu₃(VO₄)₂(OH)₂
• [Ba²⁺][Cu²⁺₃][(OH)₂|(VO₄)₂]^8-

• Class: Vanadate - Hydroxide

• Color: Yellow green, Dark green
• Streak: Pale green
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Perfect on {001} (1 plane), Imperfect on {011} (1 plane)
• Hardness: 3-4
• Density: 4.6

• System: Monoclinic
• Group: 2/m, B2/m
• Lattice: a=10.3, b=5.9, c=7.7, β=116.4