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Oldhamite

A valid IMA mineral species - grandfathered
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About OldhamiteHide

04422850014947472796565.jpg
Thomas Oldham
Formula:
(Ca,Mg)S
Colour:
pale brown to dark brown
Hardness:
4
Specific Gravity:
2.58
Crystal System:
Isometric
Member of:
Name:
Named after Thomas Oldham (4 May 1816, Dublin, Ireland – 17 July 1878, Rugby, England), Director of the Indian Geological Survey (1850-1876).
Galena Group.

Known from several meteorites.

Terrestrial oldhamite is associated with pyrometamorpism (especially with coal fires). Quite unstable in air: hydrolysis makes it pass into portlandite.

Also occurs in anthropogenic blast furnace slag. As such, it may accumulate as much as 25 wt.% Mn and 8 wt.% K (Grapes, 2006).


Unique IdentifiersHide

Mindat ID:
2970
Long-form identifier:
mindat:1:1:2970:0
GUID
(UUID V4):
9fdf9ccf-99de-44c8-bb54-cc8b2bc131e4

IMA Classification of OldhamiteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
CaS
First published:
1870

Classification of OldhamiteHide

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.
3.4.2

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
4 : Sulphides etc. of Group II metals other than Hg (Mg, Ca, Zn, Cd)

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
OldIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
OldThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Pronunciation of OldhamiteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of OldhamiteHide

Transparency:
Transparent
Colour:
pale brown to dark brown
Comment:
tarnishes strongly on exposure to humid air
Hardness:
Cleavage:
Distinct/Good
{001}
Density:
2.58 g/cm3 (Measured)    2.589 g/cm3 (Calculated)

Optical Data of OldhamiteHide

Type:
Isotropic
RI values:
n = 2.137
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Very High
Internal Reflections:
many
Comments:
colorless to pale brown in transmitted light

Chemistry of OldhamiteHide

Mindat Formula:
(Ca,Mg)S
Common Impurities:
Mg,Na,Fe,Cu

Crystallography of OldhamiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Setting:
Fm3m
Cell Parameters:
a = 5.6948 Å
Unit Cell V:
184.69 ų (Calculated from Unit Cell)
Z:
4
Comment:
on synthetic material

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0011284OldhamiteWyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York rocksalt structure Crystal Structures 1 85-23719630293
0018102OldhamiteOftedal I (1927) Die Gitterkonstanten von Ca O, Ca S, Ca Se, Ca Te. _cod_database_code 1011236 Zeitschrift fur Physikalische Chemie 128 135-15819270293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.846 Å(100)
2.013 Å(70)
1.6439 Å(21)
1.2737 Å(20)
1.1627 Å(14)
1.4238 Å(10)
0.9491 Å(8)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Pre-terrestrial "Ur-minerals">4.57
1 : Stellar atmosphere condensates
Stage 1: Primary nebular phases4.567-4.561
4 : Primary chondrule phases4.566–4.561
Stage 2: Planetesimal differentiation and alteration4.566-4.550
5 : Primary asteroid phases4.566–4.560
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
50 : Coal and/or oil shale minerals<0.36
51 : Pyrometamorphic minerals (see also #54 and #56)<0.36
Stage 10b: Anthropogenic minerals<10 Ka
54 : Coal and other mine fire minerals (see also #51 and #56)
56 : Slag and smelter minerals (see also #51 and #55)

Type Occurrence of OldhamiteHide

General Appearance of Type Material:
single-crystal nodules, to 3 mm
Place of Conservation of Type Material:
The Natural History Museum, London, England, 32100.
Geological Setting of Type Material:
enstatite chondrite meteorite
Associated Minerals at Type Locality:

Other Language Names for OldhamiteHide

German:Oldhamit
Simplified Chinese:陨硫钙石
Spanish:Oldhamita

Relationship of Oldhamite to other SpeciesHide

Member of:
Other Members of this group:
AlabanditeMnSIso. m3m (4/m 3 2/m) : Fm3m
AltaitePbTeIso. m3m (4/m 3 2/m) : Fm3m
ClausthalitePbSeIso. m3m (4/m 3 2/m) : Fm3m
GalenaPbSIso. m3m (4/m 3 2/m) : Fm3m
Niningerite(Mg,Fe2+,Mn2+)SIso. m3m (4/m 3 2/m) : Fm3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Oldhamite associated with ShulamititeCa3TiFe3+AlO8
5 photos of Oldhamite associated with FluorkyuygeniteCa12Al14O32[(H2O)4F2]
5 photos of Oldhamite associated with LarniteCa2SiO4
4 photos of Oldhamite associated with FluoriteCaF2
4 photos of Oldhamite associated with PericlaseMgO
4 photos of Oldhamite associated with PortlanditeCa(OH)2
3 photos of Oldhamite associated with CuspidineCa8(Si2O7)2F4
3 photos of Oldhamite associated with ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
3 photos of Oldhamite associated with SpurriteCa5(SiO4)2(CO3)
2 photos of Oldhamite associated with Wurtzite(Zn,Fe)S

Related Minerals - Strunz-mindat GroupingHide

2.CD.SvetlanaiteSnSeOrth. mmm (2/m 2/m 2/m) : Pnma
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. m3m (4/m 3 2/m) : Fm3m
2.CD.10 vaQuiroguitePb23Sb6S32
2.CD.10Keilite(Fe2+,Mg)SIso. m3m (4/m 3 2/m) : Fm3m
2.CD.15aCinnabarHgSTrig. 3 2 : P31 2 1
2.CD.15bHypercinnabarHgSHex.

Other InformationHide

Special Storage/
Display Requirements:
tarnishes strongly on exposure to humid air
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for OldhamiteHide

References for OldhamiteHide

Reference List:

Localities for OldhamiteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Algeria
 
  • Bordj Badji Mokhtar Province
    • Bordj Badji Mokhtar District
      • Bordj Badji Mokhtar
Antarctica
 
  • Eastern Antarctica
    • Buckley Island quadrangle
      • Lewis Cliff
    • Queen Maud Land
      • Queen Fabiola Mts
    • Victoria Land
      • Allan Hills
      • Elephant Moraine
      • Grosvenor Mountains
      • Queen Alexandra Range
Australia
 
  • South Australia
    • Murray Basin
      • Murray Mallee
        • Pinnaroo
  • Western Australia
    • Coolgardie Shire
      • Kambalda
Azerbaijan
 
  • Aghjabadi District
    • Hindarx
Canada
 
  • Alberta
    • Sturgeon County
  • Ontario
    • Renfrew County
      • Greater Madawaska
        • Blithfield Township
Chile
 
  • Atacama
    • Chañaral Province
      • Potrerillos
China
 
  • Guizhou
    • Guiyang
      • Qingzhen County
Estonia
 
  • Viljandi County
    • Pillistfer (Pilistvere)
Finland
 
  • Satakunta
    • Huittinen
  • Southwest Finland
    • Pargas
      • Nauvo
France
 
  • Auvergne-Rhône-Alpes
    • Drôme
      • Nyons
        • Aubres
  • Occitanie
    • Aveyron
      • Rodez
        • Sévérac-d'Aveyron
    • Haute-Garonne
      • Toulouse
        • Saint-Jory
Germany
 
  • Bavaria
    • Swabia
      • Ostallgäu District
        • Schwangau
  • Thuringia
    • Greiz District
      • Kauern
India
 
  • Bihar
    • Muzaffarpur District
  • Uttar Pradesh
    • Basti District
      • Gorakhpur
Israel
 
  • Southern District (HaDarom District)
    • Tamar Regional Council
Jordan
 
  • Amman Governorate
    • Transjordan Plateau
      • Daba-Siwaqa complex
        • Hashem region
          • Lisdan-Siwaga Fault
            • Siwaga
              • Tulul al Hammam
  • Irbid Governorate
    • Maqarin area
Malawi
 
  • Central Region
    • Nkhotakota
Middle East
 
Morocco
 
  • Laâyoune-Sakia El Hamra Region
    • Tarfaya Province
      • Daoura-El Hagounia Cercle
        • El Hagounia Caïdat
New Zealand
 
  • Taranaki Region
Nigeria
 
  • Adamawa
    • Mayo-Belwa
North Africa
 
  • Sahara Desert
Northwest Africa Meteorites
 
Pakistan
 
  • Punjab Province
    • Bahawalpur District
    • Sargodha District
  • Sindh Province
    • Khairpur District
Poland
 
  • Lower Silesian Voivodeship
    • Kłodzko County
      • Gmina Nowa Ruda
        • Przygórze
          • Bolesław Mine
  • Lublin Voivodeship
    • Zamość County
  • Silesian Voivodeship
    • Siemianowice Śląskie
Romania
 
  • Galați County
Russia
 
  • Chelyabinsk Oblast
    • Korkinsky District
  • Kurgan Oblast
    • Vargashinsky District
  • Mordovia
South Africa
 
  • Eastern Cape
    • Chris Hani District Municipality
      • Intsika Yethu Local Municipality
  • Northern Cape
    • ZF Mgcawu District Municipality
      • Kgatelopele Local Municipality
        • Daniëlskuil
Sudan
 
  • Kassala
    • Gash delta
  • River Nile
Tanzania
 
  • Manyara Region
    • Babati District
Ukraine
 
  • Donetsk Oblast
    • Donetsk
      • Kalinin coal mine
USA
 
  • California
    • El Dorado County
      • West Belt
        • Coloma Mining District
          • Coloma
            • Sutter Mill Bar and River (Old Sutter Mill site)
  • Colorado
    • Weld County
      • Johnstown
  • Kansas
    • Norton County
  • Kentucky
    • Whitley County
  • Louisiana
    • Winn Parish
  • Pennsylvania
    • Chester County
      • Warwick Township
        • Warwick (Saint Marys)
          • Hopewell Mines
  • South Carolina
    • Lee County
      • Bishopville
  • Texas
    • Brewster County
      • Marathon
        • Gage Ranch
    • Lubbock County
Western Sahara
 
  • al-Saqiyah al-Hamra'a (Saguia el Hamra)
Yemen
 
  • Hadhramaut Governorate
Mercury
 
  • Homer Basin
 
and/or  
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