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Pararammelsbergite

Year of discovery: 1940 (Hudson Bay mine, Canada, Moose Horn mine, Canada, and Keeley-Frontier mine, Canda), 1963 (Japan)

Locality list: 2 localities of pararammelsbergite

• NiAs₂
• [Ni²⁺][As₂]

• Class: Arsenide

• Polymorph: Rammelsbergite (Orthorhombic), Krutovite (Cubic)

• Ni => Cu: Paxite
• Ni => Co: Safflorite, Clinosafflorite
• Ni => Fe: Löllingite (Lollingite)
• Ni => Os: Omeiite
• Ni => Ru: Anduoite
• Ni => Pt: Sperrylite

• As => S: Vaesite
• As => Se: Kullerudite, Penroseite
• As => Sb: Nisbite

• Color: Silver white
• Tarnish: White
• Streak: Grayish black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: {001} Tabular, Dendritic

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 5.5
• Density: 7.2

• System: Orthorhombic
• Group: mmm, Pbma
• Lattice: a=5.8, b=5.8, c=11.4