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Moncheite Mineral Data
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General Moncheite Information
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 Chemical Formula: |
(Pt,Pd)(Te,Bi)2 |
| Composition: |
Molecular Weight = 468.81 gm |
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Bismuth 22.29 % Bi |
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Tellurium 40.83 % Te |
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Palladium 5.68 % Pd |
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Platinum 31.21 % Pt |
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______ |
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100.00 % |
| Empirical Formula: |
Pt0.75Pd0.25Te1.5Bi0.5 |
| Environment: |
As grains in chalcopyrite, also overgrowing merenskyite. |
| IMA Status: |
Approved IMA 1963 |
| Locality: |
Monchegorsk deposit, Monche Tundra, Murmansk,Kola peninsula, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Moncheite + Pronunciation  |
| Synonym: |
ICSD 41385 |
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PDF 18-977 |
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Moncheite Image |
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Images:
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Moncheite Chalcopyrite
Comments: White moncheite with chalcopyrite (orange, blue and violet tarnishing colors) in silicate matrix. Polished section (from microprobe analysis) in reflected light.
Location: Lukkulaisvaara ultrabasic Massif, Olanga (Oulanka) River, Oulanka plutonic complex, Karelia Republic, Northern Region, Russia.
Scale: Picture size 0.11 mm.
© Thomas Witzke / Abraxas-Verlag |
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Images:
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Insizwaite Moncheite
Comments: Back-scattered electron image showing b) intergrowth of taimyrite-tatyanaite with moncheitei-insizwaite (CanMin, v 42, p 611).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia.
Scale: See Image.
© Canadian Mineralogist |
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Moncheite Crystallography
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| Axial Ratios: |
a:c = 1:1.306 |
| Cell Dimensions: |
a = 4.049, c = 5.288, Z = 1; V = 75.08 Den(Calc)= 10.37 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.93(1), 2.11(0.8), 2.02(0.7), |
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Physical Properties of Moncheite
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| Cleavage: |
{0001} Good |
| Color: |
Steel gray. |
| Density: |
10 |
| Diaphaneity: |
Opaque |
| Habit: |
Inclusions - Generally found as inclusions in other minerals. |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
2-3 - Gypsum-Calcite |
| Luster: |
Metallic |
| Streak: |
gray |
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Optical Properties of Moncheite
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| RL Anisotrophism: |
Strong, except in basal sections. |
| RL Color: |
White. |
| RL Pleochroism: |
Weak in air, distinct in oil. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Moncheite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
50.30 |
51.60 |
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| 420 nm |
51.50 |
52.60 |
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| 440 nm |
52.40 |
53.50 |
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| 460 nm |
53.40 |
54.40 |
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| 480 nm |
54.20 |
55.10 |
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| 500 nm |
54.90 |
55.80 |
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| 520 nm |
55.50 |
56.40 |
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| 540 nm |
56.00 |
56.90 |
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| 560 nm |
56.40 |
57.30 |
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| 580 nm |
56.70 |
57.60 |
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| 600 nm |
57.10 |
58.00 |
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| 620 nm |
57.40 |
58.40 |
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| 640 nm |
57.70 |
58.70 |
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| 660 nm |
58.00 |
59.00 |
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| 680 nm |
58.30 |
59.20 |
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| 700 nm |
58.40 |
59.40 |
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Calculated Relative Intensity Colors of Moncheite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
170% |
| R1 |
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| R2 |
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Calculated Properties of Moncheite
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| Electron Density: |
Bulk Density (Electron Density)=8.38 gm/cc
note: Specific Gravity of Moncheite =10.4 gm/cc.
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| Fermion Index: |
Fermion Index = 0.15
Boson Index = 0.85 |
| Photoelectric: |
PEMoncheite =1,113.32 barns/electron
U=PEMoncheite x rElectron Density=9,333.51 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Moncheite is Not Radioactive |
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Moncheite Classification
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| Dana Class: |
02.12.14.03 (02)Sulfides - Including Selenides and Tellurides |
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(02.12)where Am Bn Xp, with (m+n):p=1:2 |
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(02.12.14)Melonite Group (Trigonal: P-3m1) AX2 type |
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02.12.14.01 Melonite NiTe2 P 3m1 3 2/m |
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02.12.14.02 Kitkaite NiTeSe P 3m1 3 2/m |
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02.12.14.03 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m |
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02.12.14.04 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m |
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02.12.14.05 Berndtite SnS2 P 3m1 3 2/m |
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02.12.14.06 Shuangfengite IrTe2 P 3m1 3 2/m |
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02.12.14.07 Sudovikovite! PtSe2 P 3m1 3 2/m |
| Strunz Class: |
02.EA.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.E - Metal Sulfides, M:S � 1:2 |
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02.EA -M:S = 1:2 |
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02.EA.20 Berndtite SnS2 P 3m1 3 2/m |
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02.EA.20 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m |
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02.EA.20 Melonite NiTe2 P 3m1 3 2/m |
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02.EA.20 Kitkaite NiTeSe P 3m1 3 2/m |
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02.EA.20 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m |
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02.EA.20 Sudovikovite! PtSe2 P 3m1 3 2/m |
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02.EA.20 Shuangfengite IrTe2 P 3m1 3 2/m |
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Other Moncheite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Moncheite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Moncheite
(Pt,Pd)(Te,Bi)2
Dana No: 02.12.14.03 Strunz No: 02.EA.20
Locality:
Notes:
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