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Spherocobaltite

IMA approved correct spelling is Spherocobaltite, not Sphaerocobaltite.

Year of discovery: 1877 (St Daniel mine, Germany), 1947 (Japan)

Locality list: 2 localities of spherocobaltite

• CoCO₃
• (Co,Ca)CO₃
• [Co²⁺][CO₃]^2-

• Class: Calcite group
• Class: Carbonate
• Soluble in: HCl (Slowly), hot HCl (with bubbles), hot HNO₃ (with bubbles), hot H₂SO₄ (with bubbles)
• Alter to Heterogenite.

• Ni => Ca: Calcite, Aragonite, Vaterite
• Ni => Mg: Magnesite
• Ni => Fe: Siderite
• Ni => Cd: Otavite
• Ni => Mn: Rhodochrosite
• Ni => Ni: Gaspéite (Gaspeite)
• Ni => Zn: Smithsonite
• Ni => Ba: Witherite
• Ni => Sr: Strontianite
• Ni => Pb: Cerussite
• Ni => Na₂: Gregoryite

• Color: Red
• Streak: Red
• Luster: Vitreous
• Diaphaneity: Tranparent-Translucent

• Cleavage: Perfect on {1011} (3 planes)
• Hardness: 3-4
• Density: 4.1

• System: Trigonal
• Group: (-3)m, R(-3)c
• Lattice: a=4.7, c=15.0

Synonym: Sphaerocobaltite, Cobaltcalcite