Keithconnite
A valid IMA mineral species
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About Keithconnite
Formula:
Pd20Te7
Hardness:
5
Specific Gravity:
11.72 (Calculated)
Crystal System:
Trigonal
Name:
Named for Herbert Keith Conn (1923-2004), Canadian geologist and mine official, who was instrumental in the discovery of Pt-Pd mineralization of the Stillwater deposit, and who provided the material for study.
Unique Identifiers
Mindat ID:
2176
Long-form identifier:
mindat:1:1:2176:6
GUID
(UUID V4):
(UUID V4):
f0ab45e2-0ed8-4d52-9740-42fe4e9d9807
IMA Classification of Keithconnite
Approved
Classification of Keithconnite
2.BC.20
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.
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.
2.2.6.1
2 : SULFIDES
2 : AmBnXp, with (m+n):p = 3:1
2 : SULFIDES
2 : AmBnXp, with (m+n):p = 3:1
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Kei | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Keithconnite
Transparency:
Opaque
Hardness:
5 on Mohs scale
Hardness:
VHN15=394 - 424 kg/mm2 - Vickers
Density:
11.72 g/cm3 (Calculated)
Optical Data of Keithconnite
Anisotropism:
Moderate to strong
Colour in reflected light:
cream colored
Pleochroism:
Weak
Comments:
Not detectable in air; very slight in oil.
Comments:
dull cream with brownish tint with kotulskite; gray next to telluropalladinite.
Chemistry of Keithconnite
Mindat Formula:
Pd20Te7
Elements listed:
Common Impurities:
Pb,Bi
Crystallography of Keithconnite
Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 11.458(10) Å, c = 11.296(12) Å
Ratio:
a:c = 1 : 0.986
Unit Cell V:
1,284.32 Ă
Âł (Calculated from Unit Cell)
Z:
3
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.26 Ă | (100) |
2.16 Ă | (90) |
0.791 Ă | (40) |
1.32 Ă | (30) |
0.885 Ă | (30) |
2.22 Ă | (20) |
1.40 Ă | (20) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
26 : Hadean detrital minerals | |
High-? alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) | |
Stage 4b: Highly evolved igneous rocks | >3.0 |
37 : Layered igneous intrusions and related PGE minerals |
Type Occurrence of Keithconnite
Co-Type Localities:
General Appearance of Type Material:
grains to 220 Âľm
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, 12187, 12188; Royal Ontario Museum, Toronto, Canada, M35867; National Museum of Natural History, Washington, D.C., USA, 114975
Geological Setting of Type Material:
layered ultrabasic complex
Associated Minerals at Type Locality:
Reference:
Cabri, L.J., Rowland, J.F., Laflamme, J.H.G., and Stewart, J.M. (1979) Keithconnite, telluropalladinite and other palladium-platinum tellurides from the Stillwater Complex, Montana. Canadian Mineralogist: 17: 589-594.
Synonyms of Keithconnite
Other Language Names for Keithconnite
German:Keithconnit
Simplified Chinese:ä¸ćšç˘˛éŻçż
ĺŻç˘˛éŻçż
ĺŻç˘˛éŻçż
Spanish:Keithconnita
Traditional Chinese:ä¸ćšç˘˛é礌
ĺąç˘˛é礌
ĺąç˘˛é礌
Varieties of Keithconnite
Germanian Keithconnite | |
Lead-bearing Keithconnite | A lead-bearing variety of keithconnite. |
Common Associates
Associated Minerals Based on Photo Data:
4 photos of Keithconnite associated with Melonite | NiTe2 |
1 photo of Keithconnite associated with Osmium | (Os,Ir,Ru) |
1 photo of Keithconnite associated with Iron-Platinum alloy | (Pt,Fe) |
1 photo of Keithconnite associated with Chalcopyrite | CuFeS2 |
1 photo of Keithconnite associated with Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
1 photo of Keithconnite associated with Kotulskite | Pd(Te,Bi)2-x (x â 0.4) |
Related Minerals - Strunz-mindat Grouping
2.BC. | UM2004-45-Se:AgHgPd | (Ag,Cu)6Hg2Pd2Se3 |
2.BC. | Fleetite | Cu2RhIrSb2 |
2.BC. | Coldwellite | Pd3Ag2S |
2.BC. | Panskyite | Pd9Ag2Pb2S4 |
2.BC.05 | Palladseite | Pd17Se15 |
2.BC.05 | Miassite | Rh17S15 |
2.BC.05 | UM2000-47-S:CuFePdPt | PtPd(Fe,Cu)S |
2.BC.10 | Oosterboschite | (Pd,Cu)7Se5 |
2.BC.15 | Chrisstanleyite | Ag2Pd3Se4 |
2.BC.15 | JagßÊite | Cu2Pd3Se4 |
2.BC.25 | Vasilite | (Pd,Cu)16(S,Te)7 |
2.BC.30 | Telluropalladinite | Pd9Te4 |
2.BC.35 | Luberoite | Pt5Se4 |
2.BC.35 | Kojonenite | Pd7-xSnTe2 (0.3 ⤠x ⤠0.8) |
2.BC.37 | Kravtsovite | PdAg2S |
2.BC.40 | Oulankaite | (Pd,Pt)5(Cu,Fe)4SnTe2S2 |
2.BC.40 | Lukkulaisvaaraite | Pd14Ag2Te9 |
2.BC.42 | Monchetundraite | Pd2NiTe2 |
2.BC.45 | Telargpalite | (Pd,Ag)3(Te,Bi) |
2.BC.45 | Thalhammerite | Pd9Ag2Bi2S4 |
2.BC.47 | VymazalovĂĄite | Pd3Bi2S2 |
2.BC.50 | Temagamite | Pd3HgTe3 |
2.BC.55 | Sopcheite | Ag4Pd3Te4 |
2.BC.55 | Bowlesite | PtSnS |
2.BC.60 | Laflammeite | Pd3Pb2S2 |
2.BC.65 | Tischendorfite | Pd8Hg3Se9 |
Other Information
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 Keithconnite
mindat.org URL:
https://www.mindat.org/min-2176.html
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References for Keithconnite
Reference List:
Localities for Keithconnite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
All localities listed without proper references should be considered as questionable.
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Quick NavTopAbout KeithconniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesVarietiesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Lukkulaisvaara ultrabasic Massif, Olanga River, Oulanka plutonic complex, Loukhsky District, Republic of Karelia, Russia