Roshchinite

Formula: Ag₁₉Pb₁₀Sb₅₁S₉₆

Origin of name: for Yu. V. Roschin, Kazakhstanish geologist

Crystal system: orthorhombic

Crystal class: 2/m 2/m 2/m

Twinning:

Unit cell: 

Colour: silver-gray to lead-gray

Diaphaneity: opaque

Luster: metallic

Habit: short, prismatic partly rounded crystals 0.5 to 4 mm

Hardness: 2.5

Specific gravity: 5.265

Cleavage: none

Tenacity: 

Streak: steel-gray

Synonyms/varieties:

Comments: