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Coldwellite

A valid IMA mineral species
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07627370017272332287573.jpg
Coldwellite, etc.

Marathon deposit, Coldwell complex, Thunder Bay District, Ontario, Canada
07627370017272332287573.jpg
Coldwellite, etc.

Marathon deposit, Coldwell complex, Thunder Bay District, Ontario, Canada
07627370017272332287573.jpg
Coldwellite, etc.

Marathon deposit, Coldwell complex, Thunder Bay District, Ontario, Canada
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About ColdwelliteHide

Formula:
Pd3Ag2S
Colour:
White with a light pinkish brown tint
Lustre:
Metallic
Specific Gravity:
9.90 (Calculated)
Crystal System:
Isometric
Name:
For the type locality.
Known synthetic analogue. Currently the only known approved mineral with Pd-Ag-S combination. See also 'Unnamed (Ag-Pd Sulphide)'.


Unique IdentifiersHide

Mindat ID:
46423
Long-form identifier:
mindat:1:1:46423:1

IMA Classification of ColdwelliteHide

Classification of ColdwelliteHide

Strunz-mindat (2026):
2.BC.

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
C : With Rh, Pd, Pt, etc.

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

Physical Properties of ColdwelliteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
White with a light pinkish brown tint
Streak:
Could not be measured
Comment:
could not be measured
Density:
9.90(1) g/cm3 (Calculated)

Optical Data of ColdwelliteHide

Anisotropism:
absent
Bireflectance:
not observed
Reflectivity:
WavelengthR1 (%)
400nm40.0%
440nm40.9%
470nm41.9%
500nm42.7%
546nm44.9%
560nm44.1%
589nm44.0%
620nm44.2%
650nm45.0%
680nm45.9%
700nm46.6%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 46.6%.
Internal Reflections:
absent
Pleochroism:
Non-pleochroic

Chemistry of ColdwelliteHide

Mindat Formula:
Pd3Ag2S
Element Weights:
Element% weight
Pd56.301 %
Ag38.045 %
S5.655 %

Calculated from ideal end-member formula.
Elements listed:
Ag, Pd, S - search for minerals with similar chemistry
Common Impurities:
Fe

Crystallography of ColdwelliteHide

Crystal System:
Isometric
Class (H-M):
432 - Gyroidal
Space Group:
P4332
Setting:
P4332
Cell Parameters:
a = 7.2470(8) Å
Unit Cell V:
380.61 ų
Z:
4

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of ColdwelliteHide

Synonyms of ColdwelliteHide

Other Language Names for ColdwelliteHide

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Coldwellite associated with PyrrhotiteFe1-xS
1 photo of Coldwellite associated with VysotskitePdS

Related Minerals - Strunz-mindat GroupingHide

2.BC.PanskyitePd9Ag2Pb2S4Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BC.FleetiteCu2RhIrSb2Iso. m3m(4/m32/m) : Fd3m
2.BC.'UM2004-45-Se:AgHgPd'(Ag,Cu)6Hg2Pd2Se3
2.BC.05'UM2000-47-S:CuFePdPt'PtPd(Fe,Cu)S
2.BC.05MiassiteRh17S15Iso. m3m(4/m32/m) : Pm3n
2.BC.05PalladseitePd17Se15Iso. m3m(4/m32/m)
2.BC.10Oosterboschite(Pd,Cu)7Se5Orth.
2.BC.15ChrisstanleyiteAg2Pd3Se4Mon. 2/m : P21/b
2.BC.15JagüéiteCu2Pd3Se4Mon. 2/m : P21/b
2.BC.20KeithconnitePd20Te7Trig. 3 : R3
2.BC.25Vasilite(Pd,Cu)16(S,Te)7Iso. 43m : I43m
2.BC.30TelluropalladinitePd9Te4Mon. 2/m : P21/b
2.BC.35KojonenitePd7-xSnTe2 (0.3 ≤ x ≤ 0.8)Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BC.35LuberoitePt5Se4Mon. 2/m : P21/b
2.BC.37KravtsovitePdAg2SOrth. mmm(2/m2/m2/m) : Cmcm
2.BC.40Oulankaite(Pd,Pt)5(Cu,Fe)4SnTe2S2Tet.
2.BC.40LukkulaisvaaraitePd14Ag2Te9Tet. 4/m : I4/m
2.BC.42MonchetundraitePd2NiTe2Orth. mmm(2/m2/m2/m) : Ibam
2.BC.45Telargpalite(Pd,Ag)3(Te,Bi)Iso.
2.BC.45ThalhammeritePd9Ag2Bi2S4Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BC.47VymazalováitePd3Bi2S2Iso. 23 : I213
2.BC.50TemagamitePd3HgTe3Trig. 3m : P3m1
2.BC.55BowlesitePtSnSOrth. mm2 : Pca21
2.BC.55SopcheiteAg4Pd3Te4Orth.
2.BC.60LaflammeitePd3Pb2S2Mon. 2/m : B2/m
2.BC.65TischendorfitePd8Hg3Se9Orth.

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.

Internet Links for ColdwelliteHide

References for ColdwelliteHide

Localities for ColdwelliteHide

Showing 5 localities.

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.
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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.
Canada (TL)
 
  • Ontario
    • Thunder Bay District
      • Coldwell complex
Williams et al. (2014) +1 other reference
Good et al. (2017)
Russia
 
  • Murmansk Oblast
    • Fedorovo-Pansky massif (Pana layered complex)
Groshev +6 other references
Ivanov et al. (2020, July)
Groshev +6 other references
Quick NavTopAbout ColdwelliteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
 
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