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Skippenite

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San Miguel Mine, Moctezuma, Mun. de Moctezuma, Sonora, Mexico
© Dan & Diana Weinrich Minerals

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Formula:
Bi
 
2
TeSe
 
2
System:TrigonalColour:Steel-gray
Hardness:2½
Member of:Tetradymite Group
Name:Named in honor of George Skippen (b. 1936), metamorphic petrologist, Professor of Geology, Carleton University, Ottawa, Ontario.


Tetradymite Group.

Classification of Skippenite

IMA status:Approved
Strunz 8th edition ID:2/D.09-50
Nickel-Strunz 10th (pending) edition ID:2.DC.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
C : Variable M:S
Dana 8th edition ID:2.11.7.6

2 : SULFIDES
11 : AmBnXp, with (m+n):p = 2:3
Hey's CIM Ref.:3.7.36

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
7 : Sulphides etc. of V, As, Sb and Bi
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Type Occurrence of Skippenite

Type Locality:Otish Mountains U deposit, Otish Mts, Baie-James, Nord-du-Québec, Québec, Canada
Year of Discovery:1987

Physical Properties of Skippenite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Steel-gray
Streak:Black
Hardness (Mohs):2½

Crystallography of Skippenite

Crystal System:Trigonal
Cell Parameters:a = 4.18Å, c = 29.12Å
Ratio:a:c = 1 : 6.967
Unit Cell Volume:V 440.63 ų (Calculated from Unit Cell)

Chemical Properties of Skippenite

Formula:
Bi
 
2
TeSe
 
2
Essential elements:Bi, Se, Te
All elements listed in formula:Bi, Se, Te
Common Impurities:Cu,Pb,S

Relationship of Skippenite to other Species

Member of:Tetradymite Group
Other Members of Group:

- +
Ingodite
Bi
 
2
TeS
Kawazulite
Bi
 
2
Te
 
2
Se
Sulphotsumoite
Bi
 
3
Te
 
2
S
Telluronevskite
Bi
 
3
TeSe
 
2
Tetradymite
Bi
 
2
Te
 
2
S
Tsumoite
BiTe
Vihorlatite
Bi
 
24
Se
 
17
Te
 
4
Related Minerals - Nickel-Strunz Grouping):

- +
2.DC.05Hedleyite
Bi
 
7
Te
 
3
2.DC.05Ikunolite
Bi
 
4
(S,Se)
 
3
2.DC.05Ingodite
Bi
 
2
TeS
2.DC.05Joséite-B
Bi
 
4
Te
 
2
S
2.DC.05Kawazulite
Bi
 
2
Te
 
2
Se
2.DC.05Laitakarite
Bi
 
4
Se
 
2
S
2.DC.05Nevskite
Bi(Se,S)
2.DC.05Paraguanajuatite
Bi
 
2
(Se,S)
 
3
2.DC.05Pilsenite
Bi
 
4
Te
 
3
2.DC.05Sulphotsumoite
Bi
 
3
Te
 
2
S
2.DC.05Tellurantimony
Sb
 
2
Te
 
3
2.DC.05Tellurobismuthite
Bi
 
2
Te
 
3
2.DC.05Tetradymite
Bi
 
2
Te
 
2
S
2.DC.05Tsumoite
BiTe
2.DC.05Baksanite
Bi
 
6
Te
 
2
S
 
3
2.DC.05Joséite-C
Bi
 
16
Te
 
3
S
 
9
2.DC.05Protojoséite
Bi
 
4
TeS
 
2
2.DC.05Sztrókayite
Bi
 
3
TeS
 
2
2.DC.05Vihorlatite
Bi
 
24
Se
 
17
Te
 
4
2.DC.05Telluronevskite
Bi
 
3
TeSe
 
2
2.DC.05UM1983-09-S:BiPbTe
PbBi
 
3
S
 
2
Te
Related Minerals - Hey's Index Grouping:

- +
3.7.1Patrónite
VS
 
4
3.7.2Duranusite
As
 
4
S
3.7.3Dimorphite
As
 
4
S
 
3
3.7.4Realgar
As
 
4
S
 
4
3.7.5Pararealgar
As
 
4
S
 
4
3.7.6Alacránite
As
 
8
S
 
9
3.7.7Uzonite
As
 
4
S
 
5
3.7.8Orpiment
As
 
2
S
 
3
3.7.9Jeromite
3.7.10Laphamite
As
 
2
(Se,S)
 
3
3.7.11Getchellite
AsSbS
 
3
3.7.12Wakabayashilite
[(As,Sb)
 
6
S
 
9
][As
 
4
S
 
5
]
3.7.13Pääkkönenite
Sb
 
2
AsS
 
2
3.7.14Stibnite
Sb
 
2
S
 
3
3.7.15Metastibnite
Sb
 
2
S
 
3
3.7.16Tellurantimony
Sb
 
2
Te
 
3
3.7.17Bismuthinite
Bi
 
2
S
 
3
3.7.18Nevskite
Bi(Se,S)
3.7.19Guanajuatite
Bi
 
2
(Se,S)
 
3
3.7.21Ikunolite
Bi
 
4
(S,Se)
 
3
3.7.22Laitakarite
Bi
 
4
Se
 
2
S
3.7.23Poubaite
PbBi
 
2
(Se,Te,S)
 
4
3.7.24Tellurobismuthite
Bi
 
2
Te
 
3
3.7.25Součekite
PbCuBi(S,Se)
 
3
3.7.26Tsumoite
BiTe
3.7.27Pilsenite
Bi
 
4
Te
 
3
3.7.28Hedleyite
Bi
 
7
Te
 
3
3.7.29Tetradymite
Bi
 
2
Te
 
2
S
3.7.30Joséite
Bi
 
4
TeS
 
2
3.7.31Joséite-B
Bi
 
4
Te
 
2
S
3.7.32Ingodite
Bi
 
2
TeS
3.7.33Sulphotsumoite
Bi
 
3
Te
 
2
S
3.7.34Kawazulite
Bi
 
2
Te
 
2
Se
3.7.37Kochkarite
PbBi
 
4
Te
 
7
3.7.38Rucklidgeite
(Bi,Pb)
 
3
Te
 
4
3.7.39Aleksite
PbBi
 
2
Te
 
2
S
 
2
3.7.40Junoite
Cu
 
2
Pb
 
3
Bi
 
8
(S,Se)
 
16

Other Names for Skippenite

Synonyms:
IMA1986-033
Other Languages:
German:Skippenit
Russian:Скиппенит
Spanish:Skippenita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Skippenite

Reference List:

- +
JOHAN, Z., PICOT, P. & RUHLMANN, F. (1987): The ore mineralogy of the Otish Mountains uranium deposit, Quebec: skippenite, Bi2Se2Te, and watkinsonite, Cu2PbBi4(Se,S)8, two new mineral species. Quebec. Canadian Mineralogist 25, 625-638. Abstracted in: American Mineralogist (1989): 74: 947.

Internet Links for Skippenite

Search Engines:
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    • External Links:
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  • Look for Skippenite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Skippenite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
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  • Find Skippenite on www.crystalclassics.co.uk
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    • Localities for Skippenite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Québec
      • Nord-du-Québec
        • Baie-James
          • Otish Mts
    		JOHAN, Z., PICOT, P. & RUHLMANN, F. (1987): The ore mineralogy of the Otish Mountains uranium deposit, Quebec: skippenite, Bi2Se2Te, and watkinsonite, Cu2PbBi4(Se,S)8, two new mineral species. Canadian Mineralogist 25, 625-638.
    Mexico
     
    • Sonora
      • Mun. de Moctezuma
    		Lapis 2001(1), 11-40
    Dan Weinrich
    Russia
     
    • Far-Eastern Region
      • Kamchatka Oblast'
    		V.A. Kovalenker, O.Yu. Plotinskaya (2005): Te and Se mineralogy of Ozernovskoe and Prasolovskoe epithermal gold deposits, Kuril – Kamchatka volcanic belt. Geochemistry, Mineralogy and Petrology 43, 118-123. [http://www.geology.bas.bg/mineralogy/gmp_files/gmp43/Kovalenker.pdf]
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