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Crookesite

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William Crookes
Formula:
Cu7(Tl, Ag)Se4
Formely considered (Cu,Tl,Ag)2Se.
Colour:
Lead Grey
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
6.90
Crystal System:
Tetragonal
Name:
For British scientist, Sir William Crookes (1832-1919), who discovered thallium in 1861.
This page provides mineralogical data about Crookesite.


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Classification of CrookesiteHide

Approved, 'Grandfathered' (first described prior to 1959)
2.BD.50

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
D : With Hg, Tl
2.4.12.1

2 : SULFIDES
4 : AmBnXp, with (m+n):p = 2:1
3.5.12

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
5 : Sulphides etc. of Hg and Tl

Physical Properties of CrookesiteHide

Metallic
Transparency:
Opaque
Colour:
Lead Grey
Hardness:
2½ - 3 on Mohs scale
Hardness:
VHN100=92 - 123 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
Two at right angles
Density:
6.90 g/cm3 (Measured)    7.443 g/cm3 (Calculated)

Optical Data of CrookesiteHide

Type:
Anisotropic
Anisotropism:
Weak but distinct in brownish tones

Chemical Properties of CrookesiteHide

Formula:
Cu7(Tl, Ag)Se4

Formely considered (Cu,Tl,Ag)2Se.
IMA Formula:
Cu7TlSe4
Common Impurities:
Fe

Crystallography of CrookesiteHide

Crystal System:
Tetragonal
Cell Parameters:
a = 10.435 Å, c = 3.954 Å
Ratio:
a:c = 1 : 0.379
Unit Cell V:
430.55 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Disseminated specks and in veinlets.

Type Occurrence of CrookesiteHide

Geological Setting of Type Material:
Hydrothermal deposits

Other Language Names for CrookesiteHide

German:Crookesit
Simplified Chinese:硒铊银铜矿
Spanish:Crookesita
Traditional Chinese:硒鉈銅銀礦

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite7 photos of Crookesite associated with Calcite on mindat.org.
Bukovite6 photos of Crookesite associated with Bukovite on mindat.org.
Biotite2 photos of Crookesite associated with Biotite on mindat.org.
Klockmannite2 photos of Crookesite associated with Klockmannite on mindat.org.
Berzelianite1 photo of Crookesite associated with Berzelianite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

2.BD.UM2004-33-S:AgCuHgSe(Ag,Cu)8Hg3(S,Se)7
2.BD.05ImiteriteAg2HgS2Mon.
2.BD.10GortdrumiteCu18FeHg6S16Orth.
2.BD.15BalkaniteCu9Ag5HgS8Mon. 2/m : P2/m
2.BD.15Danielsite(Cu,Ag)14HgS8Orth.
2.BD.20DonharrisiteNi3HgS3Mon. 2/m : B2/m
2.BD.25CarliniteTl2STrig. 3 : R3
2.BD.30BukoviteTl2(Cu,Fe)4Se4Tet.
2.BD.30MurunskiteK2(Cu,Fe)4S4Tet.
2.BD.30ThalcusiteTl2Cu3FeS4Tet.
2.BD.35Rohaite(Tl,Pb,K)2Cu8.7Sb2S4Orth.
2.BD.40ChalcothalliteTl2(Cu,Fe)6SbS4Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.BD.45SabatieriteCu6TlSe4Orth.
2.BD.55BrodtkorbiteCu2HgSe2Mon. 2/m : P21/m

Related Minerals - Dana Grouping (8th Ed.)Hide

2.4.12.2SabatieriteCu6TlSe4Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

3.5.1CinnabarHgSTrig. 3 2 : P31 2 1
3.5.2HypercinnabarHgSHex.
3.5.3MetacinnabarHgSIso. 4 3m : F4 3m
3.5.4ImiteriteAg2HgS2Mon.
3.5.5TiemanniteHgSe
3.5.6BalkaniteCu9Ag5HgS8Mon. 2/m : P2/m
3.5.7Danielsite(Cu,Ag)14HgS8Orth.
3.5.8ColoradoiteHgTeIso. m3m (4/m 3 2/m)
3.5.9GortdrumiteCu18FeHg6S16Orth.
3.5.10Polhemusite(Zn,Hg)STet.
3.5.11CarliniteTl2STrig. 3 : R3
3.5.13SabatieriteCu6TlSe4Orth.
3.5.14PicotpauliteTlFe2S3Orth. mmm (2/m 2/m 2/m) : Cmcm
3.5.15RaguiniteTlFeS2Orth.
3.5.16ThalcusiteTl2Cu3FeS4Tet.
3.5.17BukoviteTl2(Cu,Fe)4Se4Tet.
3.5.18GalliteCuGaS2Tet. 4 2m : I4 2d
3.5.19RoquesiteCuInS2Tet. 4 2m : I4 2d
3.5.20InditeFeIn2S4

Other InformationHide

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

References for CrookesiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 183.
Johan, Z. (1987): Crookesite, TlCu7Se4; new data and isotypism with NH4Cu7S4. Compt. Rendus Acad. Sci. Paris, 304, 1121–1124 (in French).
American Mineralogist (1988): 73: 933.
American Mineralogist (1989): 74: 1404.
Berger, R.A. (1987): Crookesite and sabatierite in a new light — a crystallographer’s comment. Zeitschrift für Kristallographie 181, 241-249.
Eriksson L, Werner P E, Berger R, Meerschaut A (1991): Structure refinement of TlCu7Se4 from X-ray powder profile data. Journal of Solid State Chemistry 90, 61-68.

Internet Links for CrookesiteHide

Localities for CrookesiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Argentina
 
  • La Rioja
    • General Lamadrid department
      • Villa Castelli
        • Sierra de Cacho
de Brodtkorb, M. K., & Crosta, S. (2010). Reseña de la ubicación geográfica de los seleniuros de la Sierra de Umango, provincia de La Rioja. Revista de la Asociación Geológica Argentina, 67(2), 272-279.
Armenia
 
Khachaturyan, E. A.. (1957): Mineralogy of pyrite ores in the Tanzut and Chibukhla deposits of the Armenian S.S.R. Izvest. Akad. Nauk Armyan. S.S.R., Ser. Geol. i Geograf. Nauk 10 (No. 3), 13-20.
Canada
 
  • Saskatchewan
Handbook of Mineralogy; Stylianos Augustithis (1995) Atlas of the Textural Patterns of Ore Minerals and Metallogenic Processes
China
 
  • Anhui Province
    • Huaibei Prefecture
      • Suixi Co.
        • Sanpu ore field
Yanjing Chen, Huayong Chen, Khin Zaw, Pirajno, F., and Zengjie Zhang (2007): Ore Geology Reviews 31, 139-169.
Yiming Zhao, Yinan Zhang, and Chengsi Bi (1999): Ore Geology Reviews 14, 227-249.
Czech Republic
 
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Nové Město na Moravě
Kvaček, M.: Selenides from the deposits of Western Moravia, Czechoslovakia – Part II. Acta Universitatis Carolinae – Geologica, 1979, vol. 23, nos. 1-2, s. 15-38. ; Econ Geol (1997) 92:468-484
      • Žďár nad Sázavou
        • Rožná deposit
Vavřín, I.: Nové poznatky o selenidech Českého masívu. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 82-89. ; Econ Geol (1997) 92:468-484; American Mineralogist 73:933
Kvaček, M.: Selenides from the deposits of Western Moravia, Czechoslovakia – Part II. Acta Universitatis Carolinae – Geologica, 1979, vol. 23, nos. 1-2, s. 15-38.
Germany
 
  • Lower Saxony
    • Harz
      • Bad Sachsa
        • Zorge
Weiss: "Mineralfundstellen, Deutschland West", 1990
      • Lerbach
Weiss: "Mineralfundstellen, Deutschland West", 1990
Sweden (TL)
 
  • Östergötland
    • Valdemarsvik
Am Min 35 (1950), 337; Sandström, F. (2007): Skrikerum. Litiofilen 24 (1), 22-38; Econ Geol (1997) 92:468-484
Switzerland
 
  • Aargau
    • Laufenburg
      • Kaisten
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 126.
    • Rheinfelden
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 126.
Mineral and/or Locality  
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