[ Top ] [ Japanese ]

Pyrostilpnite

Year of discovery: 1868 (Churprinz Friedrich August Erbstolln mine, Germany), 1965 (Japan)

Locality list: 2 localities of pyrostilpnite

• Ag₃SbS₃
• [Ag⁺₃][Sb³⁺][S₃]^6-

• Class: Pyrostilpnite group < Ag sulfosalts < Sulfosalt class
• Class: Sulfosalt

• Polymorph: Pyrargyrite (>200degree, Trigonal)

• Sb => As: Proustite, Xanthoconite

• Color: Red
• Streak: Orange
• Luster: Adamantine
• Diaphaneity: Transparent-Translucent

• Habit: Flat rhombic parallel to {010}, Lath elongated to [001]
• Aggregate: Columnar
• Twin: {100} with (100)

• Cleavage: Perfect on {010} (1 plane)
• Hardness: 2
• Density: 5.1

• System: Monoclinic
• Group: 2/m, P2₁/c
• Lattice: a=12.2, b=15.8, c=6.2, β=90.0

Etymology: Pyro (Fire) -stilpn (shining) in Greek.