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Hollingworthite

Year of discovery: 1965 (Driekop mine, South Africa), 1981 (Japan)

Locality list: 2 localities of hollingworthite

• RhAsS
• (Rh,Pt,Pd)AsS
• [Rh⁴⁺][As³⁺][S]

• Class: Cobaltite group
• Class: Sulfide

• Rh => Co: Cobaltite
• Rh => Ni: Gersdorffite
• Rh => Ir: Irarsite (Series)
• Rh => Pt: Platarsite
• Rh => Os: Osarsite
• Rh => Ru: Ruarsite
• Rh => Fe: Arsenopyrite

• Color: Gray
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Granular

• Hardness: 6-6.5
• Density: 7.9

• System: Cubic
• Group: m3, Pa3
• Lattice: a=5.8

Etymology: Prof. Sidney Ewart Hollingworth (1899-1966), British geologist