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Stützite, Stutzite

Year of discovery: 1951 (Sacarîmb (Nagyág), Romania), 1955 (Japan)

Locality list: 4 localities of stützite

• Ag_5-xTe₃
• [Ag⁺_5-x][Te₃]
• x=0.24-0.36

• Class: Telluride

• Color: Dark gray, Brown
• Tarnish: Iridescent
• Streak: Grayish black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Hexagonal

• Cleavage: No
• Hardness: 3.5
• Density: 8.1

• System: Hexagonal
• Group: 6/mmm, P6/mmm
• Lattice: a=13.5, c=8.5

Etymology: Andreas Stütz (1747-1806), Austrian mineralogist