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Osmium

Year of discovery: 1804 (World), 1892 (Japan)

Locality list: 165 localities of osmium

• Os
• (Os,Ir,Ru)

• Class: Osmium group
• Class: Native elements
• Variety: Iridosmine (+Ir)

• Os => Ir: Iridium, Rutheniridosmine
• Os => Pt: Platinum
• Os => Pd: Palladium
• Os => Rh: Rhodium
• Os => Ru: Ruthenium
• Os => Fe: Hexaferrum, Iron
• Os => Ni: Nickel, Garutiite
• Os => (Fe,Ni): Taenite
• Os => Mo: Hexamolybdenum

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

• Habit: Prismatic

• Cleavage: Perfect on {0001} (1 plane)
• Hardness: 6-7
• Density: 22.5

• System: Hexagonal
• Group: 6/mmm, P6₃/mmc
• Lattice: a=2.7, c=4.3

Etymology: Osmi (odor) in Greek

Synonym: Native osmium