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Oldhamite Mineral Data
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General Oldhamite Information
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 Chemical Formula: |
(Ca,Mg,Fe)S |
| Composition: |
Molecular Weight = 72.14 gm |
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Calcium 50.00 % Ca |
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Magnesium 1.68 % Mg |
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Iron 3.87 % Fe |
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Sulfur 44.45 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Ca0.9Mg0.05Fe2+0.05S |
| Environment: |
Fills the intersticies between silicates in enstatite chondrite and achondrite meteorites. |
| IMA Status: |
Valid Species (Pre-IMA) 1862 |
| Locality: |
Bustee meteorite, Gorakhpur, Basti distr., Uttar Pradesh, India. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Thomas Oldham (1816-1878), Director of the Indian Geologial Survey (185o-1876). |
| Name Pronunciation: |
Oldhamite + Pronunciation  |
| Synonym: |
ICSD 60200 |
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PDF 8-464 |
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Oldhamite Image |
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Images:
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Oldhamite Crystallography
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| Cell Dimensions: |
a = 5.686, Z = 4; V = 183.83 Den(Calc)= 2.61 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.846(1), 2.013(0.7), 1.6439(0.21), |
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Physical Properties of Oldhamite
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| Cleavage: |
{001} Good |
| Color: |
Light brown, Dark brown. |
| Density: |
2.58 |
| Diaphaneity: |
Transparent |
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
| Hardness: |
4 - Fluorite |
| Luster: |
Sub Metallic |
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Optical Properties of Oldhamite
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| Optical Data: |
Isotropic, n=2.137. |
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Calculated Properties of Oldhamite
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| Electron Density: |
Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Oldhamite =2.61 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0065135547
Boson Index = 0.9934864453 |
| Photoelectric: |
PEOldhamite = 9.62 barns/electron
U=PEOldhamite x rElectron Density= 24.98 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Oldhamite is Not Radioactive |
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Oldhamite Classification
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| Dana Class: |
02.08.01.05 (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 Oldhamite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Oldhamite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Oldhamite Specimen Label here :
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Oldhamite
(Ca,Mg,Fe)S
Dana No: 02.08.01.05 Strunz No: 02.CD.10
Locality:
Notes:
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