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5 - 5½
Crystal System:
Named by R.T.M. Dobbe, W. Lustenhouwer, and M.A. Zakrzewski in 1994 in honor of Cornelis (‘Kees’) Kieft (Limmen, 29 September 1924 ‒ Heemstede, 6 February 1995), Dutch geologist and mineralogist, for his contributions to ore mineralogy.

This page provides mineralogical data about Kieftite.

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Classification of KieftiteHide


2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
C : M:S = 1:>2

12 : AmBnXp, with (m+n):p = 1:2

Physical Properties of KieftiteHide

5 - 5½ on Mohs scale

Optical Data of KieftiteHide


Chemical Properties of KieftiteHide

Common Impurities:

Crystallography of KieftiteHide

Crystal System:
Cell Parameters:
a = 9.04 Å
Unit Cell V:
738.76 ų (Calculated from Unit Cell)

Type Occurrence of KieftiteHide

Geological Setting of Type Material:
Cu-Co-sulfide skarn ore

Synonyms of KieftiteHide

Other Language Names for KieftiteHide


Relationship of Kieftite to other SpeciesHide

Other Members of this group:
Ferroskutterudite(Fe,Co)As3Iso. m3m (4/m 3 2/m) : Im3m
Nickelskutterudite(Ni,Co,Fe)As3Iso. m3 (2/m 3) : Im3
SkutteruditeCoAs3Iso. m3 (2/m 3) : Im3

Related Minerals - Nickel-Strunz GroupingHide

2.EC.05Nickelskutterudite(Ni,Co,Fe)As3Iso. m3 (2/m 3) : Im3
2.EC.05SkutteruditeCoAs3Iso. m3 (2/m 3) : Im3
2.EC.05Ferroskutterudite(Fe,Co)As3Iso. m3m (4/m 3 2/m) : Im3m

Related Minerals - Dana Grouping (8th Ed.)Hide m3 (2/m 3) : Im3,Co,Fe)As3Iso. m3 (2/m 3) : Im3

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 KieftiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kjekshus, A., Rakke, T. (1974) Compounds with the skutterudite type crystal structure. III. Structural data for arsenides and antimonides. Acta Chemica Scandinavica: A28: 99-103.
Dobbe, R.T.M., Lustenhouwer, W.J., Zakrzewski, M.A. (1994) Kieftite, CoSb3, a new member of the skutterudite group from Tunaberg, Sweden. Canadian Mineralogist: 32: 179-183.
Jambor, J.L., Roberts, A.C. (1995) New mineral names. American Mineralogist: 80: 184-188.
Nolas, G.S., Slack, G.A., Caillat, T., Meisner, G.P. (1996) Raman scattering study of antimony-based skutterudites. Journal of Applied Physics: 79: 2622-2626.
New Minerals (1997), New Minerals 1990-1994.
Anno, H., Matsubara, K., Caillat, T., Fleurial, J.P. (2000) Valence-band structure of the skutterudite compounds CoAs3, CoSb3, and RhSb3 studied by X-ray photoelectron spectroscopy. Physical Review B: 62: 10737-10743.
Peng, J., Yang, J., Bao, S., Chen, Y., Zhang, T. (2006) Study on Raman spectra of CoSb3-based skutterudite compounds. Rare Metal Materials and Engineering: 35: 272-275.

Internet Links for KieftiteHide

Localities for KieftiteHide

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.
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azzer District (Bou Azer District)
          • Bouismas (Bouismass)
Praszkier, T. (2010): Dyskrasit, Allargentum und Safflorit: Neufunde aus der Bouismas Mine, Bou Azzer, Marokko. Lapis, 35 (11), 32-34.
  • Örebro
    • Askersund
      • Zinkgruvan
Andersen, C. (2009): The mineralcomposition of the Burkland Cu-sulphide deposit at Zinkgruvan, Sweden- a supplementary study:Examensarbeten i Geologi vid Lunds Universitet- Bergrundsgeologi NR 249, 41 p
  • Södermanland
    • Nyköping
      • Tunaberg
Dobbe, R. T. M., Lustenhouwer, W. and Zakrzewski, M. A. (1994): Kieftite, CoSb3, a new member of the Skutterudite group from Tunaberg, Sweden. Canadian Mineralogist. 32, 179-183
Mineral and/or Locality  
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