Kojonenite
A valid IMA mineral species
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About Kojonenite
Formula:
Pd7-xSnTe2 (0.3 ≤ x ≤ 0.8)
Colour:
Slightly pinkish off-white
Crystal System:
Tetragonal
Name:
Named in honor of Kari K. Kojonen (b. 1949), senior research scientist in the Bedrock Geology and Resources Group of the Geological Survey of Finland.
Known synthetic analogue.
Unique Identifiers
Mindat ID:
46081
Long-form identifier:
mindat:1:1:46081:9
GUID
(UUID V4):
(UUID V4):
10487609-4b9d-4a73-ac04-4b16849a7fd8
Classification of Kojonenite
Approved
Approval year:
2013
2.BC.35
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.
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Koj | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Kojonenite
Colour:
Slightly pinkish off-white
Comment:
Against kotulskite (bright cream) in reflected plane-polarized light in polished section
Optical Data of Kojonenite
Type:
Uniaxial (-)
Anisotropism:
With rotation tints in shades of dark greenish-brown.
Pleochroism:
Non-pleochroic
Comments:
None detected
Chemical Properties of Kojonenite
Formula:
Pd7-xSnTe2 (0.3 ≤ x ≤ 0.8)
IMA Formula:
Pd7-xSnTe2 (0.3 ≤ x ≤ 0.8)
Elements listed:
Crystallography of Kojonenite
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I4/mmm
Setting:
I4/mmm
Cell Parameters:
a = 4.001(1) Å, c = 20.929(3) Å
Ratio:
a:c = 1 : 5.231
Unit Cell V:
335 ų
Z:
2
Comment:
Data from synthetic material (cfr. type description)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.4650 Å | (29) |
| 2.4906 Å | (52) |
| 2.1986 Å | (100) |
| 2.0930 Å | (18) |
| 2.0025 Å | (48) |
| 1.4469 Å | (17) |
| 1.4160 Å | (12) |
| 1.1905 Å | (17) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| 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 Kojonenite
General Appearance of Type Material:
As anhedral grains (<40 μm) in aggregates (up to about 100 μm) as inclusions in chalcopyrite and cubanite
Place of Conservation of Type Material:
Type material is deposited in the collections of the Natural History Museum, London, UK, registered number BM 1981,134
Geological Setting of Type Material:
The Howland Reef within the lower part of the banded zone of the Archean Stillwater Complex
Associated Minerals at Type Locality:
Synonyms of Kojonenite
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Kojonenite associated with Kotulskite | Pd(Te,Bi)2-x (x ≈ 0.4) |
| 1 photo of Kojonenite associated with Chalcopyrite | CuFeS2 |
| 1 photo of Kojonenite associated with Cubanite | CuFe2S3 |
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 | Jagüéite | Cu2Pd3Se4 |
| 2.BC.20 | Keithconnite | Pd20Te7 |
| 2.BC.25 | Vasilite | (Pd,Cu)16(S,Te)7 |
| 2.BC.30 | Telluropalladinite | Pd9Te4 |
| 2.BC.35 | Luberoite | Pt5Se4 |
| 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 | Vymazalováite | 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 Kojonenite
mindat.org URL:
https://www.mindat.org/min-46081.html
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References for Kojonenite
Reference List:
Localities for Kojonenite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Russia | |
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South Africa | |
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USA (TL) | |
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Minneapolis adit, J-M Reef, Stillwater County, Montana, USA