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 Mineral Name

Click here for List sorted by Weight Percent

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**128 Minerals containing Selenium (Se) sorted by Mineral Name**
% Se	Mineral Name	Chemical Formula	MW
58.57 % Se	Achavalite !	FeSe	134.81
14.55 % Se	Aguilarite #	Ag4SeS	542.50
35.61 % Se	Ahlfeldite #	(Ni,Co)SeO3·2(H2O)	221.74
14.82 % Se	Allochalcoselite !	Cu+Cu++5PbO2(SeO3)2Cl5	1,060.48
49.31 % Se	Antimonselite	Sb2Se3	480.38
49.85 % Se	Athabascaite	Cu5Se4	633.57
8.09 % Se	Babkinite !	Pb2Bi2(S,Se)3	975.45
48.19 % Se	Bambollaite	Cu(Se,Te)2	245.79
38.32 % Se	Bellidoite	Cu2Se	206.05
38.32 % Se	Berzelianite #	Cu2Se	206.05
33.26 % Se	Bohdanowiczite	AgBiSe2	474.77
57.26 % Se	Bornhardtite #	Co++Co+++2Se4	413.68
32.52 % Se	Brodtkorbite !	Cu2HgSe2	485.60
32.52 % Se	Bukovite	Tl2Cu3FeSe4	971.09
14.00 % Se	Burnsite !	KCdCu7O2(SeO3)2Cl9	1,200.93
41.26 % Se	Cadmoselite #	CdSe	191.37
11.74 % Se	Carlosruizite	K6(Na,K)4Na6Mg10(Se++++++O4)12(IO3)12·12(H2O)	4,438.69
34.86 % Se	Chalcomenite #	CuSeO3·2(H2O)	226.53
44.74 % Se	Chameanite	(Cu,Fe)4As(Se,S)4	617.65
23.85 % Se	Chloromenite !	Cu9O2(SeO3)4Cl6	1,324.46
37.61 % Se	Chrisstanleyite !	Ag2Pd3Se4	833.49
27.59 % Se	Clausthalite #	PbSe	286.16
34.86 % Se	Clinochalcomenite	CuSeO3·2(H2O)	226.53
35.58 % Se	Cobaltomenite #	CoSeO3·2(H2O)	221.92
4.94 % Se	Crerarite	(Pt,Pb)Bi3(S,Se)4-x (x~0.7)	959.01
33.57 % Se	Crookesite #	Cu7(Tl,Ag)Se4	940.92
0.31 % Se	Cupromakovickyite !	Cu4AgPb2Bi9S18	6,445.41
21.81 % Se	Demesmaekerite	Pb2Cu5(UO2)2(SeO3)6(OH)6·2(H2O)	2,172.01
17.94 % Se	Derriksite	Cu4(UO2)(SeO3)2(OH)6	880.17
71.16 % Se	Downeyite	SeO2	110.96
51.40 % Se	Drysdallite	Mo(Se,S)2	230.41
73.87 % Se	Dzharkenite	FeSe2	213.77
56.95 % Se	Eskebornite #	CuFeSe2	277.31
31.54 % Se	Eucairite #	CuAgSe	250.37
73.87 % Se	Ferroselite #	FeSe2	213.77
23.28 % Se	Fischesserite	Ag3AuSe2	678.49
21.90 % Se	Francisite	Cu3Bi(SeO3)2O2Cl	720.99
57.26 % Se	Freboldite #	CoSe	137.89
35.30 % Se	Geffroyite	(Ag,Cu,Fe)9(Se,S)8	1,342.22
23.41 % Se	Georgbokiite !	Cu5O2(SeO3)2Cl2	674.55
37.68 % Se	Giraudite	(Cu,Zn,Ag)12(As,Sb)4(Se,S)13	2,042.97
36.17 % Se	Guanajuatite #	Bi2Se3	654.84
12.27 % Se	Guilleminite	Ba(UO2)3(SeO3)2O2·3(H2O)	1,287.37
33.83 % Se	Hakite	(Cu,Hg)3(Sb,As)(Se,S)3	606.78
72.82 % Se	Hastite ?	CoSe2	216.85
13.29 % Se	Haynesite	(UO2)3(SeO3)2(OH)2·5(H2O)	1,188.09
6.12 % Se	Ikunolite	Bi4(S,Se)3	967.29
23.85 % Se	Ilinskite !	NaCu5O2(SeO3)2Cl	662.09
33.41 % Se	IMA2009-036	Ag2PbBi4Se8	1,890.54
40.40 % Se	Jagueite !	Cu2Pd3Se4	768.13
24.30 % Se	Jeromite ?	As(S,Se)2	162.50
37.13 % Se	Jolliffeite	(Ni,Co)AsSe	212.63
0.41 % Se	Jonassonite !	Au(Bi,Pb)5S4	1,344.86
10.12 % Se	Junoite	Pb3Cu2Bi8(S,Se)16	3,121.17
27.78 % Se	Kalungaite !	PdAsSe	258.08
9.76 % Se	Kawazulite	Bi2(Te,Se,S)3	728.32
22.55 % Se	Kerstenite ?	PbSeO4 (?)	350.16
29.77 % Se	Kitkaite	NiTeSe	265.25
55.41 % Se	Klockmannite #	CuSe	142.51
71.31 % Se	Krutaite	CuSe2	221.47
2.17 % Se	Kudriavite !	(Cd,Pb)Bi2S4	690.39
72.91 % Se	Kullerudite	NiSe2	216.61
6.51 % Se	Kurilite ?	(Ag,Au)2(Te,Se,S)	363.74
17.12 % Se	Laitakarite	Bi4(Se,S)3	1,037.63
50.54 % Se	Laphamite	As2(Se,S)3	351.55
12.78 % Se	Larisaite !	Na(H3O)(UO2)3(SeO3)2O2·4(H2O)	1,235.71
24.46 % Se	Luberoite	Pt5Se4	1,291.24
57.36 % Se	Makinenite	NiSe	137.65
39.44 % Se	Mandarinoite	Fe+++2Se3O9·6(H2O)	600.66
12.11 % Se	Marthozite	Cu[(UO2)3(SeO3)2O2]·8(H2O)	1,303.67
47.69 % Se	Mgriite	(Cu,Fe)3AsSe3	496.67
9.44 % Se	Miessiite !	Pd11Te2Se2	1,589.46
26.48 % Se	Milotaite !	PdSbSe	304.11
23.63 % Se	Molybdomenite #	PbSeO3	334.16
1.54 % Se	Mozgovaite !	PbBi4(S,Se)7	1,279.31
9.45 % Se	Munakataite !	Pb2Cu2(Se++++O3)(SO4)(OH)4	835.91
0.24 % Se	Mutnovskite !	Pb2AsS3(I,Cl,Br)	670.21
26.79 % Se	Naumannite #	Ag2Se	294.70
27.09 % Se	Nevskite	Bi(Se,S)	262.35
11.34 % Se	Nordstromite	Pb3CuBi7(S10Se4)	2,784.51
12.08 % Se	Olsacherite	Pb2(SeO4)(SO4)	653.42
24.67 % Se	Oosterboschite	(Pd,Cu)7Se3	960.38
8.78 % Se	Orlandiite !	Pb3(Cl,OH)4(SeO3)·(H2O)	899.16
20.02 % Se	Padmaite	PdBiSe	394.36
39.57 % Se	Palladseite	Pd17Se15	2,993.54
23.41 % Se	Parageorgbokiite !	Cu5O2(SeO3)2Cl2	674.55
25.68 % Se	Paraguanajuatite #	Bi2(Se,S)3	691.82
4.87 % Se	Pekoite	PbCuBi11(S,Se)18	3,240.51
72.72 % Se	Penroseite #	(Ni,Co,Cu)Se2	217.17
10.40 % Se	Penzhinite	(Ag,Cu)4Au(S,Se)4	759.28
50.27 % Se	Permingeatite	Cu3SbSe4	628.23
32.84 % Se	Petrovicite	PbHgCu3BiSe5	1,202.21
1.16 % Se	Petrovskaite	AuAg(S,Se)	339.25
12.69 % Se	Piretite !	Ca(UO2)3(SeO3)2(OH)4-4(H2O)	1,244.17
0.04 % Se	Pizgrischite !	(Cu,Fe)Cu14PbBi17S35	5,853.00
26.49 % Se	Platynite ?	(Bi,Pb)3(Se,S)4	894.11
15.94 % Se	Poubaite	PbBi2Se2(Te,S)2	990.51
10.99 % Se	Prewittite !	KPb1.5ZnCu6O2(SeO3)2Cl10	1,437.01
11.66 % Se	Proudite	Cu1.9Ag0.1Pb15.6Bi20.4Sb0.1S32.4Se14.5	9,823.08
34.06 % Se	Sabatierite	Cu4TlSe3	695.45

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