Monchetundraite
A valid IMA mineral species
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Formula:
Pd2NiTe2
Lustre:
Metallic
Specific Gravity:
9.45 (Calculated)
Crystal System:
Orthorhombic
Name:
The mineral is named for the locality, the Monchetundra intrusion, Kola Peninsula, Russia and for Mt. Monchetundra.
Unique Identifiers
Mindat ID:
53683
Long-form identifier:
mindat:1:1:53683:9
IMA Classification of Monchetundraite
Approved
Approval year:
2019
First published:
2020
Classification of Monchetundraite
2.BC.42
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 for Standard |
|---|---|---|
| Mtdr | 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 Monchetundraite
Optical Data of Monchetundraite
Anisotropism:
Strong
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 41.3% | 40.0% |
| 420nm | 42.4% | 41.6% |
| 440nm | 43.4% | 43.0% |
| 460nm | 43.9% | 45.0% |
| 470nm | 44.3% | 45.8% |
| 480nm | 44.7% | 46.5% |
| 500nm | 45.9% | 47.8% |
| 520nm | 47.0% | 49.2% |
| 540nm | 48.4% | 50.4% |
| 546nm | 48.7% | 50.7% |
| 560nm | 49.7% | 51.6% |
| 580nm | 50.8% | 53.0% |
| 589nm | 51.4% | 53.7% |
| 600nm | 51.9% | 54.4% |
| 620nm | 53.6% | 55.6% |
| 640nm | 54.8% | 56.7% |
| 650nm | 55.6% | 57.5% |
| 660nm | 56.4% | 58.2% |
| 680nm | 57.8% | 60.0% |
| 700nm | 60.4% | 61.9% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 61.9%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White to creamy pinkish white
Internal Reflections:
None
Pleochroism:
Strong
Comments:
Rotation tints of pale blue, orange and olive green
Chemistry of Monchetundraite
Mindat Formula:
Pd2NiTe2
Element Weights:
Elements listed:
Crystallography of Monchetundraite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Ibam
Setting:
Ibam
Cell Parameters:
a = 6.31 Å, b = 11.25 Å, c = 5.17 Å
Ratio:
a:b:c = 0.561 : 1 : 0.46
Unit Cell V:
367.01 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.8117 Å | (100) |
| 2.6190 Å | (33) |
| 2.5835 Å | (32) |
| 2.3000 Å | (41) |
| 2.1874 Å | (39) |
| 2.1189 Å | (22) |
| 2.0993 Å | (22) |
| 1.9024 Å | (52) |
| 1.8411 Å | (26) |
| 1.3263 Å | (32) |
Reference:
Comments:
Synthetic. The data are from Vymazalová et al. (2020).
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]) |
Type Occurrence of Monchetundraite
General Appearance of Type Material:
Euhedral grains (up to about 20 μm) intergrown with kotulskite and pentlandite.
Place of Conservation of Type Material:
Mineralogical collections of the Department of Earth Sciences, Natural History Museum, London SW7 5BD, UK, catalogue number BM2019,2
Geological Setting of Type Material:
In metasomatically altered sulfide-bearing orthopyroxenite, formed in post-magmatic conditions, at temperatures of below 500 °C. Occurs in polymineralic PGM intergrowths and more often as two or three phase grains in secondary silicates.
Associated Minerals at Type Locality:
Synonyms of Monchetundraite
Other Language Names for Monchetundraite
Common Associates
Associations Based on Photo Data:
| 1 photo of Monchetundraite associated with Nipalarsite | Ni8Pd3As4 |
| 1 photo of Monchetundraite associated with Sperrylite | PtAs2 |
| 1 photo of Monchetundraite associated with Isomertieite | Pd11Sb2As2 |
| 1 photo of Monchetundraite associated with Palarstanide | Pd5(Sn,As)2 |
| 1 photo of Monchetundraite associated with Kotulskite | Pd(Te,Bi)2-x (x ≈ 0.4) |
| 1 photo of Monchetundraite associated with Pentlandite | (NixFey)Σ9S8 |
Related Minerals - Strunz-mindat Grouping
| 2.BC. | Panskyite | Pd9Ag2Pb2S4 |
| 2.BC. | Fleetite | Cu2RhIrSb2 |
| 2.BC. | Coldwellite | Pd3Ag2S |
| 2.BC. | 'UM2004-45-Se:AgHgPd' | (Ag,Cu)6Hg2Pd2Se3 |
| 2.BC.05 | 'UM2000-47-S:CuFePdPt' | PtPd(Fe,Cu)S |
| 2.BC.05 | Miassite | Rh17S15 |
| 2.BC.05 | Palladseite | Pd17Se15 |
| 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 | Kojonenite | Pd7-xSnTe2 (0.3 ≤ x ≤ 0.8) |
| 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.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 | Bowlesite | PtSnS |
| 2.BC.55 | Sopcheite | Ag4Pd3Te4 |
| 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 Monchetundraite
mindat.org URL:
https://www.mindat.org/min-53683.html
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References for Monchetundraite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2019) CNMNC Newsletter No 50, New minerals and nomenclature modifications approved in 2019. Mineralogical Magazine, 83 (4) 615-620 doi:10.1180/mgm.2019.46
Localities for Monchetundraite
Showing 1 localities.
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 (TL) | |
| Miyawaki et al. (2019) +2 other references |
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