Mineral Species containing Selenium (Se)

Element Properties, Isotopic Compositions for Selenium

**Selenium (Se) Element Properties**
Atomic Mass	78.96
Atomic Number	34
Name Origins	Greek, selene = "moon."
Year Discovered	1817
Discovery Credits	Discovered by J. J. Berzelius at Stockholm, Sweden.
Remarks	Obtained as a silvery metallic allotrope or red amorphous powder, which is less stable. Burns in air, unaffected by water, dissolves in concentrated nitric acid and alkalies. Used in photoelectric cells, photocopier drums, solar cells, and semiconductors. Diagnostic tests: Native Se and Se^2-: Selenium and selenides are detected by heating the powdered mineral on charcoal and are detected by a very pronounced smell described as radishes or rotting radishes. If the selenium is present in quantities, the blowpipe test evolves a brownish smoke which deposits a silvery coating of SeO2 near the assay. If this coating is touched with the reducing flame, an azure-blue color is evident. The open tube test, selenium yields a white oxide which crystallizes in radiating prisms on the sides, often tinged with reddish selenium. The coating is volatile and will advance depending on the location of the flame. The closed tube test, selenium volatizes and condenses as black globules fused on the inside of the glass which may have a reddish tint in the thinnest portion of the sublimate. Selenates (SeO₄)^2- and Selenites (SeO₃)^2-: Fuse a sample on charcoal mixed with with soda (Na₂CO₃) and charcoal dust in the reducing flame of the blowpipe. The reduction of SeO₄or SeO₃is detected by the radish odor. The azure blue selenium flame test color may be noticeable.
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 %
Se	119.904048	74	34	0.9000%		Stable
Se	121.903054	75	34	0.0000%	118.5	Days	beta -	0.864	100.00%
Se	122.904271	76	34	9.2000%		Stable
Se	123.902823	77	34	7.6000%		Stable
Se	124.904433	78	34	23.7000%		Stable
Se	125.903314	80	34	49.8000%		Stable
Se	126.905227	82	34	8.8000%		Stable

Selenium (Se) Minerals sorted by Descending Weight Percent

Click here for List sorted by Mineral Name

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**128 Minerals containing Selenium (Se) sorted by Descending Weight Percent**
% Se	Mineral Name	Chemical Formula	MW
73.87 % Se	Ferroselite #	FeSe2	213.77
73.87 % Se	Dzharkenite	FeSe2	213.77
72.91 % Se	Kullerudite	NiSe2	216.61
72.82 % Se	Hastite ?	CoSe2	216.85
72.82 % Se	Trogtalite #	CoSe2	216.85
72.72 % Se	Penroseite #	(Ni,Co,Cu)Se2	217.17
71.31 % Se	Krutaite	CuSe2	221.47
71.16 % Se	Downeyite	SeO2	110.96
64.21 % Se	Wilkmanite	Ni3Se4	491.91
64.21 % Se	Trustedtite	Ni3Se4	491.91
63.06 % Se	Tyrrellite #	(Cu,Co,Ni)3Se4	500.87
59.74 % Se	Verbeekite !	PdSe2	264.34
58.57 % Se	Achavalite !	FeSe	134.81
57.36 % Se	Sederholmite	NiSe	137.65
57.36 % Se	Makinenite	NiSe	137.65
57.26 % Se	Freboldite #	CoSe	137.89
57.26 % Se	Bornhardtite #	Co++Co+++2Se4	413.68
56.95 % Se	Eskebornite #	CuFeSe2	277.31
55.41 % Se	Klockmannite #	CuSe	142.51
54.70 % Se	Stilleite #	ZnSe	144.35
51.40 % Se	Drysdallite	Mo(Se,S)2	230.41
50.54 % Se	Laphamite	As2(Se,S)3	351.55
50.27 % Se	Permingeatite	Cu3SbSe4	628.23
49.85 % Se	Athabascaite	Cu5Se4	633.57
49.31 % Se	Antimonselite	Sb2Se3	480.38
48.19 % Se	Bambollaite	Cu(Se,Te)2	245.79
47.69 % Se	Mgriite	(Cu,Fe)3AsSe3	496.67
45.31 % Se	Umangite #	Cu3Se2	348.56
44.74 % Se	Chameanite	(Cu,Fe)4As(Se,S)4	617.65
44.74 % Se	Sudovikovite !	PtSe2	353.00
41.26 % Se	Cadmoselite #	CdSe	191.37
40.40 % Se	Jagueite !	Cu2Pd3Se4	768.13
39.57 % Se	Palladseite	Pd17Se15	2,993.54
39.44 % Se	Mandarinoite	Fe+++2Se3O9·6(H2O)	600.66
39.38 % Se	Schlemaite !	(Cu,[ ])6(Pb,Bi)Se4	824.04
38.32 % Se	Bellidoite	Cu2Se	206.05
38.32 % Se	Berzelianite #	Cu2Se	206.05
37.68 % Se	Giraudite	(Cu,Zn,Ag)12(As,Sb)4(Se,S)13	2,042.97
37.61 % Se	Chrisstanleyite !	Ag2Pd3Se4	833.49
37.13 % Se	Jolliffeite	(Ni,Co)AsSe	212.63
36.17 % Se	Guanajuatite #	Bi2Se3	654.84
35.61 % Se	Ahlfeldite #	(Ni,Co)SeO3·2(H2O)	221.74
35.58 % Se	Cobaltomenite #	CoSeO3·2(H2O)	221.92
35.30 % Se	Geffroyite	(Ag,Cu,Fe)9(Se,S)8	1,342.22
34.86 % Se	Clinochalcomenite	CuSeO3·2(H2O)	226.53
34.86 % Se	Chalcomenite #	CuSeO3·2(H2O)	226.53
34.06 % Se	Sabatierite	Cu4TlSe3	695.45
33.83 % Se	Hakite	(Cu,Hg)3(Sb,As)(Se,S)3	606.78
33.57 % Se	Crookesite #	Cu7(Tl,Ag)Se4	940.92
33.41 % Se	IMA2009-036	Ag2PbBi4Se8	1,890.54
33.26 % Se	Bohdanowiczite	AgBiSe2	474.77
32.84 % Se	Petrovicite	PbHgCu3BiSe5	1,202.21
32.52 % Se	Bukovite	Tl2Cu3FeSe4	971.09
32.52 % Se	Brodtkorbite !	Cu2HgSe2	485.60
32.31 % Se	Tischendorfite !	Pd8Hg3Se9	2,150.81
31.54 % Se	Eucairite #	CuAgSe	250.37
29.77 % Se	Kitkaite	NiTeSe	265.25
29.64 % Se	Watkinsonite	PbCu2Bi4(Se,S)8	1,731.55
29.00 % Se	Selenojalpaite !	Ag3CuSe2	544.63
28.25 % Se	Tiemannite #	HgSe	279.55
27.78 % Se	Kalungaite !	PdAsSe	258.08
27.59 % Se	Clausthalite #	PbSe	286.16
27.09 % Se	Nevskite	Bi(Se,S)	262.35
26.79 % Se	Naumannite #	Ag2Se	294.70
26.49 % Se	Platynite ?	(Bi,Pb)3(Se,S)4	894.11
26.48 % Se	Milotaite !	PdSbSe	304.11
25.68 % Se	Paraguanajuatite #	Bi2(Se,S)3	691.82
25.47 % Se	Selenostephanite	Ag5Sb(Se,S)4	930.04
24.67 % Se	Oosterboschite	(Pd,Cu)7Se3	960.38
24.46 % Se	Luberoite	Pt5Se4	1,291.24
24.30 % Se	Jeromite ?	As(S,Se)2	162.50
24.03 % Se	Sophiite	Zn2(SeO3)Cl2	328.64
23.85 % Se	Ilinskite !	NaCu5O2(SeO3)2Cl	662.09
23.85 % Se	Chloromenite !	Cu9O2(SeO3)4Cl6	1,324.46
23.63 % Se	Molybdomenite #	PbSeO3	334.16
23.41 % Se	Parageorgbokiite !	Cu5O2(SeO3)2Cl2	674.55
23.41 % Se	Georgbokiite !	Cu5O2(SeO3)2Cl2	674.55
23.28 % Se	Fischesserite	Ag3AuSe2	678.49
23.24 % Se	Skippenite	Bi2Se2(Te,S)	679.60
22.55 % Se	Kerstenite ?	PbSeO4 (?)	350.16
21.90 % Se	Francisite	Cu3Bi(SeO3)2O2Cl	720.99
21.81 % Se	Demesmaekerite	Pb2Cu5(UO2)2(SeO3)6(OH)6·2(H2O)	2,172.01
21.06 % Se	Vihorlatite !	Bi24Se17Te4	6,525.04
20.02 % Se	Padmaite	PdBiSe	394.36
17.96 % Se	Schmiederite	Pb2Cu++2(Se++++O3)(Se++++++O4)(OH)4	879.44
17.94 % Se	Derriksite	Cu4(UO2)(SeO3)2(OH)6	880.17
17.12 % Se	Laitakarite	Bi4(Se,S)3	1,037.63
15.94 % Se	Poubaite	PbBi2Se2(Te,S)2	990.51
15.35 % Se	Telluronevskite !	Bi3TeSe2	890.10
14.99 % Se	Soucekite	PbCuBi(S,Se)3	632.20
14.82 % Se	Allochalcoselite !	Cu+Cu++5PbO2(SeO3)2Cl5	1,060.48
14.55 % Se	Aguilarite #	Ag4SeS	542.50
14.00 % Se	Burnsite !	KCdCu7O2(SeO3)2Cl9	1,200.93
13.29 % Se	Haynesite	(UO2)3(SeO3)2(OH)2·5(H2O)	1,188.09
12.78 % Se	Larisaite !	Na(H3O)(UO2)3(SeO3)2O2·4(H2O)	1,235.71
12.69 % Se	Piretite !	Ca(UO2)3(SeO3)2(OH)4-4(H2O)	1,244.17
12.55 % Se	Wittite #	Pb3Bi4(S,Se)9	1,886.80
12.27 % Se	Guilleminite	Ba(UO2)3(SeO3)2O2·3(H2O)	1,287.37
12.11 % Se	Marthozite	Cu[(UO2)3(SeO3)2O2]·8(H2O)	1,303.67
12.08 % Se	Olsacherite	Pb2(SeO4)(SO4)	653.42

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