Mineral Species sorted by the element Co Cobalt (original) (raw)

Cobalt (Co) Element Properties

Atomic Mass 58.9332
Atomic Number 27
Name Origins German, koblad = "goblin."
Year Discovered 1735
Discovery Credits Discovered by G. Brandt at Stockhlm, Sweden.
Remarks Lustrous, silvery-blue, hard mental; ferromagnetic. Stable in air, slowly attacked by dilute acids. Cobalt 60 is a useful radio isotope. Used in alloys for magnets, ceramics, catalysts, and paints.Diagnostic tests: A beautiful blue bead is obtained with using the borax bead test in the oxidizing and reducing flame. If sulfur or arsenic is present, the mineral should be roasted first to oxidize those elements. A magnetic mass is obtained if the mineral is powdered, mixed with soda (Na2CO3), and fused in a reducing flame (Note, Iron and Nickel are also yield magnetic masses). In solution, cobalt forms pink to red to blue solutions, yielding a bluish pink precipitate (Co2+(OH)2) on adding NaOH. H2O2 will turn the precipitate black (Co3+(OH)3).
References Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also WebElements,ChemiCool

Naturally Occurring Isotopes

Symbol Isotope Mass Isotope Nuclide Number Isotope Number Natural Abundance Half-life Half-life Units Decay Mode Decay Mode MeV Decay Mode %
Co 58.993798 59 27 100.0000% Stable

Mineral Species sorted by the element Co (Cobalt )

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%Co Mineral Name Chemical Formula MW
67.40%Co Cobaltpentlandite Co9S8 786.93
64.76%Co Jaipurite * CoS 91.00
64.10%Co Heterogenite-2H Co+++O(OH) 91.94
64.10%Co Heterogenite-3R Co+++O(OH) 91.94
57.95%Co Linnaeite Co++Co+++2S4 305.06
51.34%Co Wairauite CoFe 114.78
49.55%Co Sphaerocobaltite CoCO3 118.94
47.89%Co Cattierite CoS2 123.07
42.74%Co Bornhardtite Co++Co+++2Se4 413.68
42.74%Co Freboldite CoSe 137.89
35.52%Co Cobaltite CoAsS 165.92
33.21%Co Modderite (Co,Fe)As 133.08
33.04%Co Langisite (Co,Ni)As 133.79
33.00%Co Cobaltkieserite ! CoSO4•H2O 175.01
29.53%Co Erythrite Co3(AsO4)2•8(H2O) 598.76
28.56%Co Carrollite Cu(Co,Ni)2S4 309.55
27.82%Co Pakhomovskyite ! Co3(PO4)2•8(H2O) 504.18
27.70%Co Costibite CoSbS 212.75
27.70%Co Paracostibite CoSbS 212.75
27.18%Co Hastite ? CoSe2 216.85
27.18%Co Trogtalite CoSe2 216.85
26.76%Co Alloclasite (Co,Fe)AsS 165.15
26.76%Co Glaucodot (Co,Fe)AsS 165.15
26.56%Co Cobaltomenite CoSeO3•2(H2O) 221.92
23.12%Co Cobaltaustinite CaCo(AsO4)(OH) 254.94
23.06%Co Oenite ! CoSbAs 255.60
21.74%Co Theresemagnanite (Co,Zn,Ni)6(SO4)(OH,Cl)10•8(H2O) 813.42
21.25%Co Safflorite (Co,Fe)As2 208.00
21.16%Co Burgessite ! Co2(H2O)4[(AsO3OH)]2•(H2O) 487.36
20.96%Co Bieberite CoSO4•7(H2O) 281.10
20.78%Co Willyamite (Co,Ni)SbS 212.69
20.23%Co Cobaltkoritnigite (Co,Zn)(AsO3OH)•(H2O) 218.49
19.21%Co Krasnoselskite * CoWO4 306.78
18.76%Co Mattagamite CoTe2 314.13
17.95%Co Skutterudite (Co,Ni)As3-x 246.18
17.84%Co Kolwezite (Cu,Co)2(CO3)(OH)2 218.07
17.01%Co Clinosafflorite (Co,Fe,Ni)As2 207.83
15.66%Co Aplowite (Co,Mn,Ni)SO4•4(H2O) 225.84
15.00%Co Vozhminite (Ni,Co)4(As,Sb)S2 392.79
14.51%Co Siegenite (Ni,Co)3S4 304.52
14.21%Co Petewilliamsite ! (Ni,Co,Cu)30(As2O7)15 5,730.36
14.17%Co Cochromite (Co,Ni,Fe++)(Cr,Al)2O4 207.97
13.89%Co Kieftite CoSb3 424.18
13.48%Co Comblainite Ni++6Co+++2(CO3)(OH)16•4(H2O) 874.19
13.46%Co Moorhouseite (Co,Ni,Mn)SO4•6(H2O) 262.62
13.22%Co Dayingite * CuCoPtS4 445.82
12.57%Co Cobaltlotharmeyerite ! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 468.87
12.24%Co Julienite * Na2Co++(SCN)4•8(H2O) 481.37
10.91%Co Schneebergite ! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 594.02
10.69%Co Nichromite (Ni,Co,Fe++)(Cr,Fe+++,Al)2O4 220.53
10.59%Co Tyrrellite (Cu,Co,Ni)3Se4 500.87
9.95%Co Roselite Ca2(Co,Mg)(AsO4)2•2(H2O) 444.30
9.95%Co Roselite-beta Ca2(Co,Mg)(AsO4)2•2(H2O) 444.30
9.66%Co Cohenite (Fe,Ni,Co)3C 183.04
9.53%Co Fletcherite Cu(Ni,Co)2S4 309.31
9.19%Co Rappoldite ! Pb(Co,Ni,Zn,)2(AsO4)2•2(H2O) 641.37
8.38%Co Ferroskutterudite ! (Fe,Co)As3 276.94
8.14%Co Penroseite (Ni,Co,Cu)Se2 217.17
7.76%Co Cobalttsumcorite ! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 607.66
7.63%Co Guarinoite (Zn,Co,Ni)6(SO4)(OH,Cl)10•5(H2O) 772.29
6.93%Co Jolliffeite (Ni,Co)AsSe 212.63
6.64%Co Ahlfeldite (Ni,Co)SeO3•2(H2O) 221.74
6.54%Co Smolianinovite (Co,Ni,Mg,Ca)3(Fe+++,Al)2(AsO4)4•11(H2O) 1,081.49
6.08%Co Oursinite (Co,Mg)(H3O)2[(UO2)SiO4]2•3(H2O) 871.78
6.01%Co Nickelschneebergite ! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 588.23
5.77%Co Metakirchheimerite Co(UO2)2(AsO4)2•8(H2O) 1,020.95
5.52%Co Cobaltarthurite ! CoFe+++2(AsO4)2(OH)2•4(H2O) 533.48
5.49%Co Nickelskutterudite (Ni,Co)As3-x 268.53
4.88%Co Bravoite ? (Fe,Ni,Co)S2 120.86
4.74%Co Cobaltzippeite Co++2(UO2)6(SO4)3(OH)10•16(H2O) 2,484.54
4.47%Co Westerveldite (Fe,Ni,Co)As 131.93
4.03%Co Cobaltneustadtelite ! Bi2Fe+++(Co,Fe+++)(O,OH)2(OH)2(AsO4)2 876.83
4.00%Co Wupatkiite (Co,Mg,Ni)Al2(SO4)4•22(H2O) 883.07
3.52%Co Nickellotharmeyerite ! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 501.90
3.45%Co Wendwilsonite Ca2(Mg,Co)(AsO4)2•2(H2O) 426.99
3.30%Co Asbolane (Co,Ni)1-y(Mn++++O2)2-x(OH)2-2y+2x•n(H2O) 178.74
2.71%Co Neustadtelite ! Bi2Fe+++(Fe+++,Co)(O,OH)2(OH)2(AsO4)2 870.06
2.13%Co Krettnichite ! PbMn+++2(VO4)2(OH)2 553.38
1.89%Co Martyite ! Zn3V2O7(OH)2•2H2O 468.09
1.54%Co Paganoite ! (Ni,Co)BiAsO5 420.26
1.22%Co Allabogdanite ! (Fe,Ni)2P 145.21
1.16%Co Boothite CuSO4•7(H2O) 305.54
0.77%Co Villamaninite (Cu,Ni,Co,Fe)S2 114.68
0.43%Co Bouazzerite ! Bi6(Mg,Co)11Fe14[AsO4]18O12(OH)4(H2O)86 6,531.63
0.23%Co Melliniite ! (Ni,Fe)4P 259.69
0.17%Co Arhbarite Cu2Mg(AsO4)(OH)3 349.16
0.17%Co Gillardite ! Cu3NiCl2(OH)6 422.66
0.15%Co Sugakiite ! Cu(Fe,Ni)8S8 772.05
0.15%Co Stavelotite-(La) ! La3Mn++3Cu++(Mn+++,Fe+++,Mn++++)26(Si2O7)6O30 3,438.35
0.09%Co Carminite PbFe+++2(AsO4)2(OH)2 639.87
0.08%Co Andreyivanovite ! FeCrP 138.79
0.04%Co Magnesiopascoite ! Ca2Mg[V10O28]•16H2O 1,341.11

(* - Mineral Name Is Not IMA Approved)
(! - New Dana classification added or changed from Danas New Mineralogy)
(? - IMA Discredited Mineral Species Name)

There are 92 minerals with Co in the Mineralogy Database.