Spherocobaltite or sphaerocobaltite is a cobaltcarbonate mineral with chemical composition CoCO3. In its (rare) pure form, it is typically a rose-red color, but impure specimens can be shades of pink to pale brown. It crystallizes in the trigonalcrystal system.
Spherocobaltite was first described in 1877 for an occurrence within cobalt and nickel veins in the St. Daniel Mine of the Schneeberg District, Ore Mountains, Saxony, Germany. The name is from the Greek "sphaira", sphere, and cobalt, in reference to its typical crystal habit and composition.[2] It occurs within hydrothermal cobalt-bearing mineral deposits as a rare phase associated with roselite, erythrite, annabergite and cobalt rich calcite and dolomite.[4]
Cluster of spherocobaltite crystals from the Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (size: 11.5 x 6.0 x 4.5 cm)
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February 15, 2024
spherocobaltite, sphaerocobaltite, cobalt, carbonate, mineral, with, chemical, composition, coco3, rare, pure, form, typically, rose, color, impure, specimens, shades, pink, pale, brown, crystallizes, trigonal, crystal, system, from, peramea, lérida, catalonia. Spherocobaltite or sphaerocobaltite is a cobalt carbonate mineral with chemical composition CoCO3 In its rare pure form it is typically a rose red color but impure specimens can be shades of pink to pale brown It crystallizes in the trigonal crystal system SpherocobaltiteSpherocobaltite from Peramea Lerida Catalonia SpainGeneralCategoryCarbonate mineralFormula repeating unit CoCO3IMA symbolScbt 1 Strunz classification5 AB 05Crystal systemTrigonalCrystal classHexagonal scalenohedral 3 m H M symbol 3 2 m Space groupR3 cUnit cella 4 65 c 14 95 A Z 6IdentificationFormula mass118 94 g molColorMost commonly dark magenta red pink to red brown brownish red grey greyish red velvet black due to surface alteration Crystal habitEncrustations forms crust like aggregates on matrix crystals uncommon rhombohedral to discoidalCleavagePerfect rhomboidal cleavage 2 Mohs scale hardness4LusterVitreousStreakPinkDiaphaneityTransparent to translucentSpecific gravity4 13Optical propertiesUniaxial Refractive indexne 1 600 nw 1 885Birefringence0 285PleochroismDichroic O violet red E rose redReferences 2 3 4 Discovery and occurrence editSpherocobaltite was first described in 1877 for an occurrence within cobalt and nickel veins in the St Daniel Mine of the Schneeberg District Ore Mountains Saxony Germany The name is from the Greek sphaira sphere and cobalt in reference to its typical crystal habit and composition 2 It occurs within hydrothermal cobalt bearing mineral deposits as a rare phase associated with roselite erythrite annabergite and cobalt rich calcite and dolomite 4 nbsp Cluster of spherocobaltite crystals from the Katanga Copper Crescent Katanga Shaba Democratic Republic of Congo size 11 5 x 6 0 x 4 5 cm References edit Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 a b c Spherocobaltite on Mindat Spherocobaltite at Webminerals a b Spherocobaltite in Handbook of MineralogyFurther reading editSpharocobaltit nbsp Wikimedia Commons has media related to Spherocobaltite Retrieved from https en wikipedia org w index php title Spherocobaltite amp oldid 1173835946, wikipedia, wiki, book, books, library,
