Braggite Mineral Data

Braggite Mineral Data
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General Braggite Information

Help on Chemical Formula: Chemical Formula: (Pt,Pd,Ni)S
Help on Composition: Composition: Molecular Weight = 186.91 gm
   Nickel      3.14 %  Ni
   Palladium  17.08 %  Pd
   Platinum   62.62 %  Pt
   Sulfur     17.16 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Pt0.6Pd0.3Ni0.1S
Help on Environment: Environment: In norites occurring in layered mafic intrusives, formed at high magmatic temperatures.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1932
Help on Locality: Locality: From the Rustenburg and Potgietersrust districts, Bushveld Complex, Transvaal, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: To honor Sir William Henry Bragg (1862-1942) and Professor William Lawrence Bragg (1890-1971), pioneers in the X-ray investigations of crystals, as this is the first new mineral to be discovered by X-ray methods alone.
Help on Name Pronunciation: Name Pronunciation: Braggite Say BRAGGITE
Help on Synonym: Synonym: ICSD 2585
  PDF 9-421
 

Braggite Image

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Braggite

Comments: Silvery grain of braggite in brassy-iridescent pentlandite matrix.
Location: Stillwater Complex, Sweetwater Co., Montana, USA. Scale: 3 mm grain.
© Tom Loomis / Dakota Matrix

Braggite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.02978
Help on Cell Dimensions: Cell Dimensions: a = 6.38, c = 6.57, Z = 8; V = 267.43 Den(Calc)= 9.28
Help on Crystal System: Crystal System: Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: P 41/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.86(1), 2.64(0.3), 2.93(0.3),
Click Here for Large Braggite Structure Window Crystal Structure:

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Childs J D , Hall S R , Acta Crystallographica, Section B , 29 (1973) p.1446-1451, The crystal structure of braggite, (Pt,Pd,Ni)S, Locality: Potgietersrust district, Transvaal, South Africa

 

Physical Properties of Braggite

Help on Cleavage: Cleavage: None
Help on Color: Color: Steel gray.
Help on Density: Density: 10
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luster: Luster: Metallic
 

Optical Properties of Braggite

Help on RL Anisotrophism: RL Anisotrophism: Distinct, in purplish and pinkish shades of gray and brown.
Help on RL Color: RL Color: White.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Braggite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   41.30   41.80 
   
 420 nm   41.80   42.40 
 440 nm   42.10   43.00 
 460 nm   42.40   43.40 
 480 nm   42.50   43.80 
 500 nm   42.70   44.10 
 520 nm   42.70   44.20 
 540 nm   42.60   44.20 
 560 nm   42.50   44.20 
 580 nm   42.40   44.20 
 600 nm   42.30   44.10 
 620 nm   42.20   44.10 
 640 nm   41.90   44.00 
 660 nm   41.90   43.90 
 680 nm   41.90   43.80 
 700 nm   41.50   43.80 
Calculated Relative Intensity Colors of Braggite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210%
R1                  
R2                  
 

Calculated Properties of Braggite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.88 gm/cc
note: Specific Gravity of Braggite =9.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.25
Boson Index = 0.75
Help on Photoelectric: Photoelectric: PEBraggite = 999.37 barns/electron
U=PEBraggite x rElectron Density=7,879.42 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Braggite is Not Radioactive
 

Braggite Classification
Help on Dana Class: Dana Class: 02.08.05.03 (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.05)Cooperite Group
 
02.08.05.01 Cooperite (Pt,Pd,Ni)S P 41/mmc 4/m 2/m 2/m
 
02.08.05.02 Vysotskite (Pd,Ni)S P 41/m 4/m
 
02.08.05.03 Braggite (Pt,Pd,Ni)S P 41/m 4/m
Help on Strunz Class: Strunz Class: 02.CC.35a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.C - Metal Sulfides, M:S = 1:1 (and similar)
  02.CC -With Ni, Fe, Co, PGE, etc.
 
02.CC.35a Braggite (Pt,Pd,Ni)S P 41/m 4/m
 
02.CC.35a Cooperite (Pt,Pd,Ni)S P 41/mmc 4/m 2/m 2/m
 
02.CC.35a Vysotskite (Pd,Ni)S P 41/m 4/m
 

Other Braggite 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 Braggite :
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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Braggite

(Pt,Pd,Ni)S
Dana No: 02.08.05.03 Strunz No: 02.CC.35a
Locality:

 

Notes: