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Keilite Mineral Data
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General Keilite Information
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 Chemical Formula: |
(Fe,Mn,Mg,Ca,Cr)S |
| Composition: |
Molecular Weight = 81.91 gm |
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Calcium 0.83 % Ca |
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Magnesium 4.75 % Mg |
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Manganese 23.88 % Mn |
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Zinc 0.08 % Zn |
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Chromium 1.21 % Cr |
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Iron 29.80 % Fe |
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Sulfur 39.46 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Fe2+0.43Mn2+0.35Mg0.16Ca0.01Cr0.01Zn0.001S |
| Environment: |
Found in Abee enstitie chondrite, Alberta Canada. (Fe-dominant analogue of niningerite). |
| IMA Status: |
Approved IMA 2002 (Dana # Added) |
| Locality: |
Abee enstatite chondrite, Abee, Alberta, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named after Klaus Keil (1934-), professor at the University of Hawaii. |
| Synonym: |
IMA2001-053 |
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Keilite Image |
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Images:
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Keilite
Comments: B&W polished section image (a) of keilite (Ke) with troilite/pyrrhotite (Tro/Pyr) and metal (FeNi); gray, mostly oval grains are enstatite (En) and somewhat darker interstices are feldspars (Pl). (AmMin, v92:206).
Location: Zak?odzie enstatite achondrite.
Scale: See Image.
© American Mineralogist |
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Keilite Crystallography
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| Cell Dimensions: |
a = 5.1717, Z = 4; V = 138.32 Den(Calc)= 3.93 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.585(1)(200), 2.985(0.8)(111), 1.828(0.6)(220),1.492(0.15)(222), 1.156(0.13)(420), 1.055(0.1)(422), 1.292(0.07)(400), |
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Physical Properties of Keilite
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| Cleavage: |
None |
| Color: |
Gray. |
| Diaphaneity: |
Opaque |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Luster: |
Metallic |
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Optical Properties of Keilite
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| RL Color: |
Gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Keilite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
27.20 |
 |
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| 420 nm |
27.10 |
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| 440 nm |
27.60 |
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| 460 nm |
27.20 |
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| 470 nm |
27.20 |
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| 480 nm |
27.10 |
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| 500 nm |
26.60 |
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| 520 nm |
26.60 |
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| 540 nm |
26.60 |
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| 546 nm |
26.70 |
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| 560 nm |
26.50 |
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| 580 nm |
26.70 |
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| 589 nm |
26.40 |
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| 600 nm |
25.90 |
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| 620 nm |
26.20 |
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| 640 nm |
26.10 |
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| 650 nm |
26.30 |
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| 660 nm |
25.90 |
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| 680 nm |
26.00 |
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| 700 nm |
25.90 |
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Standardized Intensity (100%) Reflection Spectra of Keilite in Oil
| λ |
R |
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∑ R(λ) |
| 400 nm |
11.80 |
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| 420 nm |
12.30 |
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| 440 nm |
12.80 |
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| 460 nm |
12.20 |
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| 470 nm |
12.20 |
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| 480 nm |
12.10 |
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| 500 nm |
12.00 |
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| 520 nm |
11.80 |
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| 540 nm |
11.80 |
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| 546 nm |
11.90 |
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| 560 nm |
11.70 |
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| 580 nm |
11.70 |
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| 589 nm |
11.70 |
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| 600 nm |
11.90 |
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| 620 nm |
11.70 |
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| 640 nm |
11.60 |
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| 650 nm |
11.70 |
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| 660 nm |
11.70 |
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| 680 nm |
11.30 |
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| 700 nm |
11.10 |
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Calculated Relative Intensity Colors of Keilite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
340% |
| R |
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Calculated Relative Intensity Colors of Keilite in Oil
Relative
Intensity |
0% |
80% |
100% |
160% |
240% |
320% |
400% |
480% |
560% |
640% |
720% |
760% |
| R |
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Calculated Properties of Keilite
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| Electron Density: |
Bulk Density (Electron Density)=3.76 gm/cc
note: Specific Gravity of Keilite =3.93 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEKeilite = 17.88 barns/electron
U=PEKeilite x rElectron Density= 67.13 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Keilite is Not Radioactive |
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Keilite Classification
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| Dana Class: |
02.08.01.09 (02)Sulfides - Including Selenides and Tellurides |
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(02.08)where Am Bn Xp, with (m+n):p=1:1 |
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(02.08.01)Galena Group (Isometric: Fm3m) |
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02.08.01.01 Galena PbS F m3m 4/m 3 2/m |
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02.08.01.02 Clausthalite PbSe F m3m 4/m 3 2/m |
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02.08.01.03 Altaite PbTe F m3m 4/m 3 2/m |
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02.08.01.04 Alabandite MnS F m3m 4/m 3 2/m |
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02.08.01.05 Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m |
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02.08.01.06 Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m |
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02.08.01.07 Borovskite Pd3SbTe4 F m3m 4/m 3 2/m |
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02.08.01.08 Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) F m3m 4/m 3 2/m |
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02.08.01.09 Keilite! (Fe,Mn,Mg,Ca,Cr)S F m3m 4/m 3 2/m |
| Strunz Class: |
02.CD.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.C - Metal Sulfides, M:S = 1:1 (and similar) |
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02.CD -With Sn, Pb, Hg, etc. |
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02.CD.10 Alabandite MnS F m3m 4/m 3 2/m |
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02.CD.10 Altaite PbTe F m3m 4/m 3 2/m |
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02.CD.10 Galena PbS F m3m 4/m 3 2/m |
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02.CD.10 Clausthalite PbSe F m3m 4/m 3 2/m |
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02.CD.10 Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m |
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02.CD.10 Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m |
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02.CD.10 Keilite! (Fe,Mn,Mg,Ca,Cr)S F m3m 4/m 3 2/m |
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Other Keilite Information
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| References: |
NAME( CanMin, 41:814) PHYS. PROP.(CanMin, 41:814) OPTIC PROP.(CanMin, 41:814) |
| See Also: |
Links to other databases for Keilite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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Keilite
(Fe,Mn,Mg,Ca,Cr)S
Dana No: 02.08.01.09 Strunz No: 02.CD.10
Locality:
Notes:
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