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Frohbergite

Year of discovery: 1947 (Robb-Montbray mine, Canada), 1989 (Japan)

Locality list: A locality of frohbergite

• FeTe₂
• [Fe²⁺][Te₂]^2-

• Class: Marcasite group
• Class: Ditelluride

• Fe => Co: Mattagamite (Series)

• Te => S: Marcasite, Pyrite
• Te => Se: Ferroselite, Dzharkenite
• Te => As: Löllingite (Lollingite)
• Te => Sb: Seinäjokite (Seinajokite)

• Color: Silver white
• Luster: Metallic
• Diaphaneity: Opaque

• Aggregate: Fine grains at the edge or inside of chalcopyrite

• Hardness: 3-4
• Density: 8.1

• System: Orthorhombic
• Group: mmm, Pnnm
• Lattice: a=5.3, b=6.3, c=3.9

Etymology: Dr.Max Hans Frohberg, Canadian economic geologist