Mineral Species sorted by the element Se Selenium

Selenium (Se ) by %

**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

Mineral Species sorted by the element Se (Selenium )

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%Se	Mineral Name	Chemical Formula	MW
100.00%Se	Selenium	Se	78.96
73.87%Se	Dzharkenite	FeSe2	213.77
73.87%Se	Ferroselite	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	Trustedtite	Ni3Se4	491.91
64.21%Se	Wilkmanite	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	Makinenite	NiSe	137.65
57.36%Se	Sederholmite	NiSe	137.65
57.26%Se	Bornhardtite	Co++Co+++2Se4	413.68
57.26%Se	Freboldite	CoSe	137.89
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	Chalcomenite	CuSeO3•2(H2O)	226.53
34.86%Se	Clinochalcomenite	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
33.26%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	Georgbokiite !	Cu5O2(SeO3)2Cl2	674.55
23.41%Se	Parageorgbokiite !	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
11.74%Se	Carlosruizite	K6(Na,K)4Na6Mg10(Se++++++O4)12(IO3)12•12(H2O)	4,438.69
11.66%Se	Proudite	Cu1.9Ag0.1Pb15.6Bi20.4Sb0.1S32.4Se14.5	9,823.08
11.34%Se	Nordstromite	Pb3CuBi7(S10Se4)	2,784.51
10.99%Se	Prewittite !	KPb1.5ZnCu6O2(SeO3)2Cl10	1,437.01
10.40%Se	Penzhinite	(Ag,Cu)4Au(S,Se)4	759.28
10.12%Se	Junoite	Pb3Cu2Bi8(S,Se)16	3,121.17
9.76%Se	Kawazulite	Bi2(Te,Se,S)3	728.32
9.45%Se	Munakataite !	Pb2Cu2(Se++++O3)(SO4)(OH)4	835.91
9.44%Se	Miessiite !	Pd11Te2Se2	1,589.46
8.78%Se	Orlandiite !	Pb3(Cl,OH)4(SeO3)•(H2O)	899.16
8.58%Se	Weibullite	Pb6Bi8(S,Se)18	3,679.81
8.46%Se	Selenopolybasite !	[(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2]	2,378.81
8.09%Se	Babkinite !	Pb2Bi2(S,Se)3	975.45
6.51%Se	Kurilite ?	(Ag,Au)2(Te,Se,S)	363.74
6.12%Se	Ikunolite	Bi4(S,Se)3	967.29
4.94%Se	Crerarite	(Pt,Pb)Bi3(S,Se)4-x(x~0.7)	959.01
4.87%Se	Pekoite	PbCuBi11(S,Se)18	3,240.51
2.48%Se	Tsnigriite	Ag9SbTe3(S,Se)3	1,595.01
2.17%Se	Kudriavite !	(Cd,Pb)Bi2S4	690.39
1.54%Se	Mozgovaite !	PbBi4(S,Se)7	1,279.31
1.16%Se	Petrovskaite	AuAg(S,Se)	339.25
0.96%Se	Abramovite !	Pb2SnInBiS7	1,066.44
0.41%Se	Jonassonite !	Au(Bi,Pb)5S4	1,344.86
0.31%Se	Cupromakovickyite !	Cu4AgPb2Bi9S18	6,445.41
0.24%Se	Mutnovskite !	Pb2AsS3(I,Cl,Br)	670.21
0.18%Se	Vurroite !	Pb20Sn2(Bi,As)22S54Cl6	9,577.60
0.04%Se	Pizgrischite !	(Cu,Fe)Cu14PbBi17S35	5,853.00

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

There are 127 minerals with Se in the Mineralogy Database.

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Mineral Species containing Selenium (Se )

Selenium (Se ) by %

Mineral Species sorted by the element Se (Selenium )