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Heyrovskýite, Heyrovskyite

Year of discovery: 1971 (Hůrky, Czech), 1972 (Japan)

Locality list: 2 localities of heyrovskýite

• Pb₁₀AgBi₅S₁₈
• Pb₁₀Ag(Bi,Sb)₅S₁₈
• [Pb²⁺₁₀][Ag⁺][Bi³⁺₅][S₁₈]^36-

• Class: Heyrovskýite (Heyrovskyite) subgroup < Lillianite group < Large 2D fragment Pb sulfosalts < Sulfosalt class
• Class: Sulfosalt

• Color: Silver white
• Streak: Dark gray
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Prismatic or acicular elongated to [001]
• Striation: [001] on {010}

• Cleavage: No
• Hardness: 4-5
• Density: 7.1

• System: Orthorhombic
• Group: mmm, Cmcm
• Lattice: a=13.6, b=30.5, c=4.1

Etymology: Jaroslav Heyrovský (Heyrovsky), Czech chemist