Tintinaite

Formula: Pb₂₂Cu₄(Sb,Bi)₃₀S₆₉

Origin of name: after locality Tintina mines, Yukon, Canada

Crystal system: Orthorhombic

Crystal class: 2/m 2/m 2/m

Twinning:

Unit cell: a = 22.3, b = 34, c = 4.04

Colour: Lead-gray

Diaphaneity: Opaque

Luster: Metallic

Habit: Bladed, radiating fibrous clusters and parallel aggregates, in small masses and aggregates

Hardness:  2.5-3

Specific gravity: 5.48

Cleavage: 1; {010} distinct

Tenacity: 

Streak: Black

Synonyms/varieties:

Comments: Series with kobellite. Found as small masses and veinlets in malachite-stained quartz.