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Safflorite

Year of discovery: 1835 (St Daniel mine, Germany), 1963 (Japan)

Locality list: 7 localities of safflorite

• CoAs₂
• (Co,Fe,Ni)As₂
• [Co²⁺][As₂]

• Class: Marcasite group
• Class: Arsenide

• Polymorph: Clinosafflorite (Monoclinic)

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

• As => Te: Mattagamite
• As => S: Cattierite
• As => Se: Trogtalite

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

• Habit: Prismatic or fibrous elongated to [010] with {101} and {310} pyramidal faces.
• Aggregate: Radial
• Twin: {011} fivelings, {101} penetration

• Cleavage: Distinct on {100} (1 plane)
• Hardness: 4.5-5
• Density: 7.2

• System: Orthorhombic
• Group: mmm, Pnnm
• Lattice: a=5.2, b=6.0, c=3.0

Etymology: Safflower as it was used as a pigment.