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 containing the element Se (Selenium )

Click Here for Mineral Species Sorted By %Se

Mineral Name Chemical Formula Se MW
Abramovite ! Pb2SnInBiS7 0.96% Se 1,066.44
Achavalite ! FeSe 58.57% Se 134.81
Aguilarite Ag4SeS 14.55% Se 542.50
Ahlfeldite (Ni,Co)SeO3•2(H2O) 35.61% Se 221.74
Allochalcoselite ! Cu+Cu++5PbO2(SeO3)2Cl5 14.82% Se 1,060.48
Antimonselite Sb2Se3 49.31% Se 480.38
Athabascaite Cu5Se4 49.85% Se 633.57
Babkinite ! Pb2Bi2(S,Se)3 8.09% Se 975.45
Bambollaite Cu(Se,Te)2 48.19% Se 245.79
Bellidoite Cu2Se 38.32% Se 206.05
Berzelianite Cu2Se 38.32% Se 206.05
Bohdanowiczite AgBiSe2 33.26% Se 474.77
Bornhardtite Co++Co+++2Se4 57.26% Se 413.68
Brodtkorbite ! Cu2HgSe2 32.52% Se 485.60
Bukovite Tl2Cu3FeSe4 32.52% Se 971.09
Burnsite ! KCdCu7O2(SeO3)2Cl9 14.00% Se 1,200.93
Cadmoselite CdSe 41.26% Se 191.37
Carlosruizite K6(Na,K)4Na6Mg10(Se++++++O4)12(IO3)12•12(H2O) 11.74% Se 4,438.69
Chalcomenite CuSeO3•2(H2O) 34.86% Se 226.53
Chameanite (Cu,Fe)4As(Se,S)4 44.74% Se 617.65
Chloromenite ! Cu9O2(SeO3)4Cl6 23.85% Se 1,324.46
Chrisstanleyite ! Ag2Pd3Se4 37.61% Se 833.49
Clausthalite PbSe 27.59% Se 286.16
Clinochalcomenite CuSeO3•2(H2O) 34.86% Se 226.53
Cobaltomenite CoSeO3•2(H2O) 35.58% Se 221.92
Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) 4.94% Se 959.01
Crookesite Cu7(Tl,Ag)Se4 33.57% Se 940.92
Cupromakovickyite ! Cu4AgPb2Bi9S18 0.31% Se 6,445.41
Demesmaekerite Pb2Cu5(UO2)2(SeO3)6(OH)6•2(H2O) 21.81% Se 2,172.01
Derriksite Cu4(UO2)(SeO3)2(OH)6 17.94% Se 880.17
Downeyite SeO2 71.16% Se 110.96
Drysdallite Mo(Se,S)2 51.40% Se 230.41
Dzharkenite FeSe2 73.87% Se 213.77
Eskebornite CuFeSe2 56.95% Se 277.31
Eucairite CuAgSe 31.54% Se 250.37
Ferroselite FeSe2 73.87% Se 213.77
Fischesserite Ag3AuSe2 23.28% Se 678.49
Francisite Cu3Bi(SeO3)2O2Cl 21.90% Se 720.99
Freboldite CoSe 57.26% Se 137.89
Geffroyite (Ag,Cu,Fe)9(Se,S)8 35.30% Se 1,342.22
Georgbokiite ! Cu5O2(SeO3)2Cl2 23.41% Se 674.55
Giraudite (Cu,Zn,Ag)12(As,Sb)4(Se,S)13 37.68% Se 2,042.97
Guanajuatite Bi2Se3 36.17% Se 654.84
Guilleminite Ba(UO2)3(SeO3)2O2•3(H2O) 12.27% Se 1,287.37
Hakite (Cu,Hg)3(Sb,As)(Se,S)3 33.83% Se 606.78
Hastite ? CoSe2 72.82% Se 216.85
Haynesite (UO2)3(SeO3)2(OH)2•5(H2O) 13.29% Se 1,188.09
Ikunolite Bi4(S,Se)3 6.12% Se 967.29
Ilinskite ! NaCu5O2(SeO3)2Cl 23.85% Se 662.09
Jagueite ! Cu2Pd3Se4 40.40% Se 768.13
Jeromite ? As(S,Se)2 24.30% Se 162.50
Jolliffeite (Ni,Co)AsSe 37.13% Se 212.63
Jonassonite ! Au(Bi,Pb)5S4 0.41% Se 1,344.86
Junoite Pb3Cu2Bi8(S,Se)16 10.12% Se 3,121.17
Kalungaite ! PdAsSe 27.78% Se 258.08
Kawazulite Bi2(Te,Se,S)3 9.76% Se 728.32
Kerstenite ? PbSeO4(?) 22.55% Se 350.16
Kitkaite NiTeSe 29.77% Se 265.25
Klockmannite CuSe 55.41% Se 142.51
Krutaite CuSe2 71.31% Se 221.47
Kudriavite ! (Cd,Pb)Bi2S4 2.17% Se 690.39
Kullerudite NiSe2 72.91% Se 216.61
Kurilite ? (Ag,Au)2(Te,Se,S) 6.51% Se 363.74
Laitakarite Bi4(Se,S)3 17.12% Se 1,037.63
Laphamite As2(Se,S)3 50.54% Se 351.55
Larisaite ! Na(H3O)(UO2)3(SeO3)2O2•4(H2O) 12.78% Se 1,235.71
Luberoite Pt5Se4 24.46% Se 1,291.24
Makinenite NiSe 57.36% Se 137.65
Mandarinoite Fe+++2Se3O9•6(H2O) 39.44% Se 600.66
Marthozite Cu[(UO2)3(SeO3)2O2]•8(H2O) 12.11% Se 1,303.67
Mgriite (Cu,Fe)3AsSe3 47.69% Se 496.67
Miessiite ! Pd11Te2Se2 9.44% Se 1,589.46
Milotaite ! PdSbSe 26.48% Se 304.11
Molybdomenite PbSeO3 23.63% Se 334.16
Mozgovaite ! PbBi4(S,Se)7 1.54% Se 1,279.31
Munakataite ! Pb2Cu2(Se++++O3)(SO4)(OH)4 9.45% Se 835.91
Mutnovskite ! Pb2AsS3(I,Cl,Br) 0.24% Se 670.21
Naumannite Ag2Se 26.79% Se 294.70
Nevskite Bi(Se,S) 27.09% Se 262.35
Nordstromite Pb3CuBi7(S10Se4) 11.34% Se 2,784.51
Olsacherite Pb2(SeO4)(SO4) 12.08% Se 653.42
Oosterboschite (Pd,Cu)7Se3 24.67% Se 960.38
Orlandiite ! Pb3(Cl,OH)4(SeO3)•(H2O) 8.78% Se 899.16
Padmaite PdBiSe 20.02% Se 394.36
Palladseite Pd17Se15 39.57% Se 2,993.54
Parageorgbokiite ! Cu5O2(SeO3)2Cl2 23.41% Se 674.55
Paraguanajuatite Bi2(Se,S)3 25.68% Se 691.82
Pekoite PbCuBi11(S,Se)18 4.87% Se 3,240.51
Penroseite (Ni,Co,Cu)Se2 72.72% Se 217.17
Penzhinite (Ag,Cu)4Au(S,Se)4 10.40% Se 759.28
Permingeatite Cu3SbSe4 50.27% Se 628.23
Petrovicite PbHgCu3BiSe5 32.84% Se 1,202.21
Petrovskaite AuAg(S,Se) 1.16% Se 339.25
Piretite ! Ca(UO2)3(SeO3)2(OH)4-4(H2O) 12.69% Se 1,244.17
Pizgrischite ! (Cu,Fe)Cu14PbBi17S35 0.04% Se 5,853.00
Platynite ? (Bi,Pb)3(Se,S)4 26.49% Se 894.11
Poubaite PbBi2Se2(Te,S)2 15.94% Se 990.51
Prewittite ! KPb1.5ZnCu6O2(SeO3)2Cl10 10.99% Se 1,437.01
Proudite Cu1.9Ag0.1Pb15.6Bi20.4Sb0.1S32.4Se14.5 11.66% Se 9,823.08
Sabatierite Cu4TlSe3 34.06% Se 695.45
Schlemaite ! (Cu,[])6(Pb,Bi)Se4 39.38% Se 824.04
Schmiederite Pb2Cu++2(Se++++O3)(Se++++++O4)(OH)4 17.96% Se 879.44
Sederholmite NiSe 57.36% Se 137.65
Selenium Se 100.00% Se 78.96
Selenojalpaite ! Ag3CuSe2 29.00% Se 544.63
Selenopolybasite ! [(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2] 8.46% Se 2,378.81
Selenostephanite Ag5Sb(Se,S)4 25.47% Se 930.04
Skippenite Bi2Se2(Te,S) 23.24% Se 679.60
Sophiite Zn2(SeO3)Cl2 24.03% Se 328.64
Soucekite PbCuBi(S,Se)3 14.99% Se 632.20
Stilleite ZnSe 54.70% Se 144.35
Sudovikovite ! PtSe2 44.74% Se 353.00
Telluronevskite ! Bi3TeSe2 15.35% Se 890.10
Tiemannite HgSe 28.25% Se 279.55
Tischendorfite ! Pd8Hg3Se9 32.31% Se 2,150.81
Trogtalite CoSe2 72.82% Se 216.85
Trustedtite Ni3Se4 64.21% Se 491.91
Tsnigriite Ag9SbTe3(S,Se)3 2.48% Se 1,595.01
Tyrrellite (Cu,Co,Ni)3Se4 63.06% Se 500.87
Umangite Cu3Se2 45.31% Se 348.56
Verbeekite ! PdSe2 59.74% Se 264.34
Vihorlatite ! Bi24Se17Te4 21.06% Se 6,525.04
Vurroite ! Pb20Sn2(Bi,As)22S54Cl6 0.18% Se 9,577.60
Watkinsonite PbCu2Bi4(Se,S)8 29.64% Se 1,731.55
Weibullite Pb6Bi8(S,Se)18 8.58% Se 3,679.81
Wilkmanite Ni3Se4 64.21% Se 491.91
Wittite Pb3Bi4(S,Se)9 12.55% Se 1,886.80

(* - 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.