Rhodarsenide Mineral Data

Rhodarsenide Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About



[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974


General Rhodarsenide Information

Help on Chemical Formula: Chemical Formula: (Rh,Pd)2As
Help on Composition: Composition: Molecular Weight = 282.49 gm
   Arsenic    26.52 %  As
   Palladium  18.84 %  Pd
   Rhodium    54.64 %  Rh
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Rh1.5Pd0.5As
Help on Environment: Environment: Placer deposits with other platinum group minerals.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: Placer deposits near the Srebrnica River, near Veluce, central Serbia, Yugoslavia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its chemical composition of rhodium and arsenic.
Help on Name Pronunciation: Name Pronunciation: Rhodarsenide + Pronunciation Say RHODARSENIDE
Help on Synonym: Synonym: IMA1996-030
 

Rhodarsenide Image

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

Rhodarsenide

Comments: BSE image of dark gray metallic inclusion of rhodarsenide in sperrylite and Os,Ir,Ru matrix. Inset images show detail BSE and epoxy grain mount.
Location: Miass River, Urals, Russia. Scale: See Image.
© Rruff Database

Rhodarsenide Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.5068:1:1.8756
Help on Cell Dimensions: Cell Dimensions: a = 5.866, b = 3.893, c = 7.302, Z = 4; V = 166.75 Den(Calc)= 11.25
Help on Crystal System: Crystal System: OrthorhombicSpace Group: P nma or Pn2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.237(1), 2.067(0.8), 2.426(0.7),
 

Physical Properties of Rhodarsenide

Help on Color: Color: Brown.
Help on Density: Density: 11.27 - 11.32, Average = 11.29
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Metallic
 

Optical Properties of Rhodarsenide

Help on RL Anisotrophism: RL Anisotrophism: Moderate to distinct.
Help on RL Color: RL Color: Brownish with a pale green tinge.
Help on RL Pleochroism: RL Pleochroism: Weak in air, distinct in oil.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Rhodarsenide in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   46.30   45.50 
   
 546 nm   48.40   47.60 
 589 nm   49.50   48.20 
 650 nm   51.20   49.80 
Calculated Relative Intensity Colors of Rhodarsenide in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 200%
R1                  
R2                  
 

Calculated Properties of Rhodarsenide

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=9.84 gm/cc
note: Specific Gravity of Rhodarsenide =11.3 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PERhodarsenide = 186.86 barns/electron
U=PERhodarsenide x rElectron Density=1,838.05 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rhodarsenide is Not Radioactive
 

Rhodarsenide Classification
Help on Dana Class: Dana Class: 02.04.19.01 (02)Sulfides - Including Selenides and Tellurides
  (02.04)where Am Bn Xp, with (m+n):p=2:1
  (02.04.19)Dana Group
 
02.04.19.01 Rhodarsenide! (Rh,Pd)2As P nma or Pn2 Ortho
 
02.04.19.02 Palladodymite! (Pd,Rh)2As P nma 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 02.AC.25b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.A - Simple Sulfides, Selenides, etc
  02.AC -Alloys of metalloids with PGE
 
02.AC.25b Rhodarsenide! (Rh,Pd)2As P nma or Pn2 Ortho
 

Other Rhodarsenide Information
Help on References: References: NAME( AmMin) PHYS. PROP.(Min.Mag.,Vol.61,p733,1997) OPTIC PROP.(MinRec, v 29, p 476)
Help on See Also: See Also: Links to other databases for Rhodarsenide :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Rhodarsenide using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Rhodarsenide :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Rhodarsenide Mineral Data :

Ask about Rhodarsenide 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 Rhodarsenide Specimen Label here :

Rhodarsenide

(Rh,Pd)2As
Dana No: 02.04.19.01 Strunz No: 02.AC.25b
Locality:

 

Notes: