Mineralogy Database

Braggite Mineral Data

Search Webmineral :

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

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


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 - Dipyramidal H-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),

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
   0%   30%   60%   90% 100% 120% 150% 180% 210%

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)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.05)Cooperite Group Cooperite (Pt,Pd,Ni)S P 41/mmc 4/m 2/m 2/m Vysotskite (Pd,Ni)S P 41/m 4/m 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 - 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

Search for Braggite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Braggite :

Ask about Braggite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Braggite Specimen Label here :


Dana No: Strunz No: 02.CC.35a





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.