Cupropavonite

Formula:  AgPbCu₂Bi₅S₁₀

Origin of name:  From copper and pavonite

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell: a = 13.45 Å, b = 4.02 Å, c = 33.06 Å, β = 93.50°

Colour:  Lead gray to tin white

Diaphaneity:  Opaque

Luster:

Habit:  Lamellar intergrowths with pavonite

Hardness:  ~ 2

Specific gravity:  7.04

Cleavage:

Tenacity:

Streak:

Synonyms/varieties:

Comments: Found in zonded mesothermal base- and precious-metal veins