Keilite Mineral Data

Keilite Mineral Data
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General Keilite Information

Help on Chemical Formula: Chemical Formula: (Fe,Mn,Mg,Ca,Cr)S
Help on Composition: Composition: Molecular Weight = 81.91 gm
   Calcium     0.83 %  Ca
   Magnesium   4.75 %  Mg
   Manganese  23.88 %  Mn
   Zinc        0.08 %  Zn
   Chromium    1.21 %  Cr
   Iron       29.80 %  Fe
   Sulfur     39.46 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+0.43Mn2+0.35Mg0.16Ca0.01Cr0.01Zn0.001S
Help on Environment: Environment: Found in Abee enstitie chondrite, Alberta Canada. (Fe-dominant analogue of niningerite).
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Abee enstatite chondrite, Abee, Alberta, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Klaus Keil (1934-), professor at the University of Hawaii.
Help on Synonym: Synonym: IMA2001-053
 

Keilite Image

Click Here for Larger Keilite Image in a New Browser Window Images:
Click Here for Larger Keilite Image

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

Keilite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 5.1717, Z = 4; V = 138.32 Den(Calc)= 3.93
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: 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),
Click Here for Large Keilite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Shimizu M , Yoshida H , Mandarino J A , The Canadian Mineralogist , 40 (2002) p.1687-1692, The new mineral species keilite, (Fe,Mg)S, the iron-dominant, analogue of niningerite

 

Physical Properties of Keilite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luster: Luster: Metallic
 

Optical Properties of Keilite

Help on RL Color: RL Color: Gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Keilite in Air
λ R  ∑ R(λ) 
 400 nm   27.20   
 420 nm   27.10 
 440 nm   27.60 
 460 nm   27.20 
 470 nm   27.20 
 480 nm   27.10 
 500 nm   26.60 
 520 nm   26.60 
 540 nm   26.60 
 546 nm   26.70 
 560 nm   26.50 
 580 nm   26.70 
 589 nm   26.40 
 600 nm   25.90 
 620 nm   26.20 
 640 nm   26.10 
 650 nm   26.30 
 660 nm   25.90 
 680 nm   26.00 
 700 nm   25.90 
Standardized Intensity (100%) Reflection Spectra of Keilite in Oil
λ R  ∑ R(λ) 
 400 nm   11.80   
 420 nm   12.30 
 440 nm   12.80 
 460 nm   12.20 
 470 nm   12.20 
 480 nm   12.10 
 500 nm   12.00 
 520 nm   11.80 
 540 nm   11.80 
 546 nm   11.90 
 560 nm   11.70 
 580 nm   11.70 
 589 nm   11.70 
 600 nm   11.90 
 620 nm   11.70 
 640 nm   11.60 
 650 nm   11.70 
 660 nm   11.70 
 680 nm   11.30 
 700 nm   11.10 
Calculated Relative Intensity Colors of Keilite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 340%
R                      
Calculated Relative Intensity Colors of Keilite in Oil
Relative
Intensity		    0%   80% 100% 160% 240% 320% 400% 480% 560% 640% 720% 760%
R                        
 

Calculated Properties of Keilite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.76 gm/cc
note: Specific Gravity of Keilite =3.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEKeilite = 17.88 barns/electron
U=PEKeilite x rElectron Density= 67.13 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Keilite is Not Radioactive
 

Keilite Classification
Help on Dana Class: Dana Class: 02.08.01.09 (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.01)Galena Group (Isometric: Fm3m)
 
02.08.01.01 Galena PbS F m3m 4/m 3 2/m
 
02.08.01.02 Clausthalite PbSe F m3m 4/m 3 2/m
 
02.08.01.03 Altaite PbTe F m3m 4/m 3 2/m
 
02.08.01.04 Alabandite MnS F m3m 4/m 3 2/m
 
02.08.01.05 Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m
 
02.08.01.06 Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m
 
02.08.01.07 Borovskite Pd3SbTe4 F m3m 4/m 3 2/m
 
02.08.01.08 Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) F m3m 4/m 3 2/m
 
02.08.01.09 Keilite! (Fe,Mn,Mg,Ca,Cr)S F m3m 4/m 3 2/m
Help on Strunz Class: Strunz Class: 02.CD.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.C - Metal Sulfides, M:S = 1:1 (and similar)
  02.CD -With Sn, Pb, Hg, etc.
 
02.CD.10 Alabandite MnS F m3m 4/m 3 2/m
 
02.CD.10 Altaite PbTe F m3m 4/m 3 2/m
 
02.CD.10 Galena PbS F m3m 4/m 3 2/m
 
02.CD.10 Clausthalite PbSe F m3m 4/m 3 2/m
 
02.CD.10 Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m
 
02.CD.10 Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m
 
02.CD.10 Keilite! (Fe,Mn,Mg,Ca,Cr)S F m3m 4/m 3 2/m
 

Other Keilite Information
Help on References: References: NAME( CanMin, 41:814) PHYS. PROP.(CanMin, 41:814) OPTIC PROP.(CanMin, 41:814)
Help on See Also: 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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Print or Cut-and-Paste your Keilite Specimen Label here :

Keilite

(Fe,Mn,Mg,Ca,Cr)S
Dana No: 02.08.01.09 Strunz No: 02.CD.10
Locality:

 

Notes: