Mineral Species sorted by the element Se Selenium (original) (raw)

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 Se2-: 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 SeO4 or SeO3 is 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.