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Violarite

Year of discovery: 1924 (Vermilion mine, Canada), 1943 (Japan)

Locality list: 21 localities of violarite

• FeNi₂S₄
• [Fe²⁺][Ni³⁺₂][S₄]^8-

• Class: Linnaeite subgroup < Thiospinel group < Spinel supergroup
• Class: Sulfide
• Soluble in: HNO₃ (Decompose)
• Insoluble in: HCl

• Fe => Cu: Fletcherite
• Fe => Ni: Polydymite (Series)
• Fe => Co: Siegenite (Series)

• Ni => Fe: Greigite (Series)
• Ni => Cr: Daubréelite (Daubreelite)
• Ni => In: Indite
• Ni => Rh: Ferrorhodsite

• Color: Violet gray, Gray
• Tarnish: Reddish brown, Purple
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Aggregate: Nodular

• Cleavage: Perfect on {001} (3 planes)
• Hardness: 4.5-5.5
• Density: 4.7

• System: Cubic
• Group: m3m, Fd3m
• Lattice: a=9.5

Etymology: Violarite (purple) in Latin