Mineral Species sorted by the element Co Cobalt

Mineral Chemistry

Cobalt (Co )

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 )

Click Here for Mineral Species Sorted By Mineral Name

%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
34.61% Co	IMA2004-021 !	Co3(PO4)2·8(H2O)	510.86
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
27.70% 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
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
8.14% 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	Nickel-skutterudite	(Ni,Co)As3-x	268.53
4.88% Co	Bravoite ?	(Fe,Ni,Co)S2	120.86
4.74% Co	Cobalt-zippeite	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
1.54% 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
0.17% Co	Arhbarite	Cu2Mg(AsO4)(OH)3	349.16

(! - New Dana classification added or changed from Danas New Mineralogy)

There are 81 minerals with Co in the Mineralogy Database.