Moncheite Mineral Data

Moncheite Mineral Data
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General Moncheite Information

Help on Chemical Formula: Chemical Formula: (Pt,Pd)(Te,Bi)2
Help on Composition: Composition: Molecular Weight = 468.81 gm
   Bismuth    22.29 %  Bi
   Tellurium  40.83 %  Te
   Palladium   5.68 %  Pd
   Platinum   31.21 %  Pt
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Pt0.75Pd0.25Te1.5Bi0.5
Help on Environment: Environment: As grains in chalcopyrite, also overgrowing merenskyite.
Help on IMA Status: IMA Status: Approved IMA 1963
Help on Locality: Locality: Monchegorsk deposit, Monche Tundra, Murmansk,Kola peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Moncheite + Pronunciation Say MONCHEITE
Help on Synonym: Synonym: ICSD 41385
  PDF 18-977
 

Moncheite Image

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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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Moncheite   Insizwaite

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

Moncheite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.306
Help on Cell Dimensions: Cell Dimensions: a = 4.049, c = 5.288, Z = 1; V = 75.08 Den(Calc)= 10.37
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.93(1), 2.11(0.8), 2.02(0.7),
Click Here for Large Moncheite Structure Window Crystal Structure:

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Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Note: cadmium iodide structure

 

Physical Properties of Moncheite

Help on Cleavage: Cleavage: {0001} Good
Help on Color: Color: Steel gray.
Help on Density: Density: 10
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: gray
 

Optical Properties of Moncheite

Help on RL Anisotrophism: RL Anisotrophism: Strong, except in basal sections.
Help on RL Color: RL Color: White.
Help on RL Pleochroism: RL Pleochroism: Weak in air, distinct in oil.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Moncheite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   50.30   51.60 
   
 420 nm   51.50   52.60 
 440 nm   52.40   53.50 
 460 nm   53.40   54.40 
 480 nm   54.20   55.10 
 500 nm   54.90   55.80 
 520 nm   55.50   56.40 
 540 nm   56.00   56.90 
 560 nm   56.40   57.30 
 580 nm   56.70   57.60 
 600 nm   57.10   58.00 
 620 nm   57.40   58.40 
 640 nm   57.70   58.70 
 660 nm   58.00   59.00 
 680 nm   58.30   59.20 
 700 nm   58.40   59.40 
Calculated Relative Intensity Colors of Moncheite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160% 170%
R1                    
R2                    
 

Calculated Properties of Moncheite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=8.38 gm/cc
note: Specific Gravity of Moncheite =10.4 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PEMoncheite =1,113.32 barns/electron
U=PEMoncheite x rElectron Density=9,333.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Moncheite is Not Radioactive
 

Moncheite Classification
Help on Dana Class: Dana Class: 02.12.14.03 (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.14)Melonite Group (Trigonal: P-3m1) AX2 type
 
02.12.14.01 Melonite NiTe2 P 3m1 3 2/m
 
02.12.14.02 Kitkaite NiTeSe P 3m1 3 2/m
 
02.12.14.03 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m
 
02.12.14.04 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m
 
02.12.14.05 Berndtite SnS2 P 3m1 3 2/m
 
02.12.14.06 Shuangfengite IrTe2 P 3m1 3 2/m
 
02.12.14.07 Sudovikovite! PtSe2 P 3m1 3 2/m
Help on Strunz Class: Strunz Class: 02.EA.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.E - Metal Sulfides, M:S £ 1:2
  02.EA -M:S = 1:2
 
02.EA.20 Berndtite SnS2 P 3m1 3 2/m
 
02.EA.20 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m
 
02.EA.20 Melonite NiTe2 P 3m1 3 2/m
 
02.EA.20 Kitkaite NiTeSe P 3m1 3 2/m
 
02.EA.20 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m
 
02.EA.20 Sudovikovite! PtSe2 P 3m1 3 2/m
 
02.EA.20 Shuangfengite IrTe2 P 3m1 3 2/m
 

Other Moncheite Information
Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
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: