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Keilite

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About KeiliteHide

08870880014948722299896.jpg
Klaus Keil
Formula:
(Fe2+,Mg)S
Colour:
Gray
Lustre:
Metallic
Specific Gravity:
3.958 (Calculated)
Crystal System:
Isometric
Name:
Named in honor of Klaus Keil (b. 15 November 1934), Professor at the University of Hawai'i, Honolulu, Hawaii, USA, in recognition of his outstanding research on the mineralogy and petrography of chondritic meteorites. He is the former director of the Hawaii Institute of Geophysics and Planetology and the University of New Mexico Institute of Meteoritics. He pioneered the use of the electron microprobe to study meteorite samples and is one of the co-inventors of the energy dispersive X-ray spectrometer.
The iron analogue of Niningerite.


Classification of KeiliteHide

Approved
Approval year:
2001
First published:
2002
2.CD.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
D : With Sn, Pb, Hg, etc.
Dana 7th ed.:
2.8.1.9

Physical Properties of KeiliteHide

Metallic
Transparency:
Opaque
Colour:
Gray
Tenacity:
Brittle
Cleavage:
Distinct/Good
Parallel to (001), (010), and (100)
Density:
3.958 g/cm3 (Calculated)

Optical Data of KeiliteHide

Reflectivity:
470nmR=27.2%
546nmR=26.7%
nmR=6.4 (589%
650nmR=26.0%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 6.4 (589%.
Colour in reflected light:
grey
Comments:
Reflectance values of keilite increase with increasing Fe content. Data shown here are for Fe-rich, in air.

Chemical Properties of KeiliteHide

Formula:
(Fe2+,Mg)S
IMA Formula:
FeS

Crystallography of KeiliteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Cell Parameters:
a = 5.1717(18) Å
Unit Cell V:
138.32 ų
Z:
4

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0004274KeiliteKarwowski L, Kryza R, Przylibski T A (2007) New chemical and physical data on keilite from the Zaklodzie enstatite achondrite American Mineralogist 92 204-2092007Zaklodzie enstatite achondrite meteorite0293
0005801KeiliteShimizu M, Yoshida H, Mandarino J A (2002) The new mineral species keilite, (Fe,Mg)S, the iron-dominant analogue of niningerite The Canadian Mineralogist 40 1687-169220020293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.985 Å(8)
2.585 Å(100)
1.828 Å(60)
1.492 Å(15)
1.292 Å(7)
1.156 Å(13)
1.055 Å(10)

Type Occurrence of KeiliteHide

General Appearance of Type Material:
Grains up to several hundred micrometers across
Place of Conservation of Type Material:
Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, Hawaii, U.S.A. (specimen UH 13)
Geological Setting of Type Material:
Enstatite chondrite
Associated Minerals at Type Locality:
Reference:
Shimizu, M., Yoshida, H., Mandarino, J.A. (2002) The new mineral species keilite, (Fe,Mg)S, the iron-dominant analogue of niningerite. The Canadian Mineralogist: 40: 1687-1692.

Synonyms of KeiliteHide

Other Language Names for KeiliteHide

German:Keilit
Russian:Кейлит
Simplified Chinese:硫镁铁矿
Traditional Chinese:硫鎂鐵礦

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Keilite associated with Kamacite(Fe,Ni)
1 photo of Keilite associated with EnstatiteMg2Si2O6

Related Minerals - Nickel-Strunz GroupingHide

2.CD.05HerzenbergiteSnSOrth. mmm (2/m 2/m 2/m)
2.CD.05TeallitePbSnS2Orth. mmm (2/m 2/m 2/m) : Pnma
2.CD.10AlabanditeMnSIso. m3m (4/m 3 2/m) : Fm3m
2.CD.10AltaitePbTeIso. m3m (4/m 3 2/m) : Fm3m
2.CD.10ClausthalitePbSeIso. m3m (4/m 3 2/m) : Fm3m
2.CD.10GalenaPbSIso. m3m (4/m 3 2/m) : Fm3m
2.CD.10Niningerite(Mg,Fe2+,Mn2+)SIso.
2.CD.10Oldhamite(Ca,Mg)SIso. m3m (4/m 3 2/m) : Fm3m
2.CD.15aCinnabarHgSTrig. 3 2 : P31 2 1
2.CD.15bHypercinnabarHgSHex.

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 KeiliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Shimizu, M., Yoshida, H., Mandarino, J.A. (2002) The new mineral species keilite, (Fe,Mg)S, the iron-dominant analogue of niningerite. The Canadian Mineralogist: 40: 1687-1692.
Mandarino, J.A. (2003) New minerals. The Canadian Mineralogist: 41: 803-828 (814).
Jambor, J.L., Roberts, A.C. (2003) New mineral names. American Mineralogist: 88: 1626-1629.
Karwowski, L., Kryza, R., Przylibski, T.A. (2007) New chemical and physical data on keilite from the Zaklodzie enstatite achondrite. American Mineralogist: 92: 204-209.
Keil, K. (2007) Occurrence and origin of keilite, (Fe>0.5,Mg<0.5)S, in enstatite chondrite impact-melt rocks and impact-melt breccias. Geochemistry: 67(1): 37-54.
Keil, K. (2008) Keilite (Fe>0.5, Mg<0.5)S as an indicator of extensive impact melting on enstatite chondrite parent asteroids. Microscopy and Microanalysis: 14(Supplement S2): 36-37.
Bullock, E.S., McCoy, T.J., Corrigan, C.M. (2012) Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference: 43: 2225.pdf.
Avril, C., Malavergne, V., Caracas, R., Zanda, B., Reynard, B., Charon, E., Bobocioiu, E., Brunet, F., Borensztajn, S., Pont, S., Tarrida, M., Guyot, F. (2013) Raman spectroscopic properties and Raman identification of CaS-MgS-MnS-FeS-Cr2FeS4 sulfides in meteorites and reduced sulfur-rich systems. Meteoritics and Planetary Science: 48: 1415-1426.

Internet Links for KeiliteHide

Localities for KeiliteHide

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.
Antarctica
 
  • Eastern Antarctica
    • Queen Maud Land
      • Queen Fabiola Mts (Yamato Mts)
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
    • Transantarctic Mountains
      • Buckley Island quadrangle
        • Lewis Cliff
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
      • Pecora Escarpment
        • LaPaz Ice Field
Izawa, M. R. M., Flemming, R. L., Banerjee, N. R. & McCausland, P. J. A. (2011) Micro-X-ray diffraction assessment of shock stage in enstatite chondrites: Meteoritics & Planetary Science 46 (5): 638-651. (May 2011)
Canada (TL)
 
  • Alberta
    • Abee
Shimizu M, Yoshida H, Mandarino J A (2002) The new mineral species keilite, (Fe,Mg)S, the iron-dominant analogue of niningerite, The Canadian Mineralogist 40, 1687-1692 ; Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
France
 
  • Occitanie
    • Haute-Garonne
      • Toulouse
        • Saint-Jory
Shimizu M, Yoshida H, Mandarino J A (2002) The new mineral species keilite, (Fe,Mg)S, the iron-dominant analogue of niningerite, The Canadian Mineralogist 40, 1687-1692
Pakistan
 
  • Punjab Province
    • Sargodha District
Shimizu M, Yoshida H, Mandarino J A (2002) The new mineral species keilite, (Fe,Mg)S, the iron-dominant analogue of niningerite, The Canadian Mineralogist 40, 1687-1692 ; Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
Poland
 
  • Lublin Voivodeship
    • Zamość County
Przylibski, T. A., Jakubowski, T., Karwowski, L., Kryza, R. & Uszczek, K. (2011) New Data on Graphite from the Zaklodzie Enstatite Achondrite (Abstract id. 5198). Meteoritics & Planetary Science 46, Supplement: A193. (July 2011); Ma, C., Beckett, J. R. & Rossman, G. R. (2012) Discovery of Buseckite, (Fe,Zn,Mn)S, a New Mineral in Zaklodzie, an Ungrouped Enstatite-Rich Achondrite. Lunar and Planetary Science Conference XLIII. LPI Contribution No. 1659, id.1520. (March 2012)
Sudan
 
  • Kassala
    • Gash delta
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
  • River Nile
Addi Bischoff, Mariam Horstmann, Andreas Pack, Matthias Laubstein & Siegfried Haberer (2010). Asteroid 2008 TC3—Almahata Sitta: A spectacular breccia containing many different ureilitic and chondritic lithologies. Meteoritics & Planetary Science 45, (#10-11), 1638-1657-1667. (Oct-Nov 2010).
Yemen
 
  • Hadhramaut Governorate
Bullock, E. S., McCoy, T. J., & Corrigan, C. M. (2012, March). Discovery of Keilite in Type 3 Enstatite Chondrites: Influence of Metamorphic Temperature on Formation. In Lunar and Planetary Science Conference (Vol. 43).
 
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