Mineralogy Database

Westerveldite Mineral Data

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General Westerveldite Information

Help on Chemical  Formula: Chemical Formula: (Fe,Ni,Co)As
Help on Composition: Composition: Molecular Weight = 131.93 gm
   Iron     25.40 %  Fe
   Cobalt    4.47 %  Co
   Nickel   13.35 %  Ni
   Arsenic  56.79 %  As
           100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+0.6Ni0.3Co0.1As
Help on Environment: Environment: As minute inclusions in maucherite which occurs in chromite-nickeline ores.
Help on IMA Status: IMA Status: Approved IMA 1972
Help on Locality: Locality: La Gallega mine, 3 km west of Ojen, Marbella Province, M´┐Żlaga, Spain. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jan Westerveld (1905-1962), Professor of Geology and Mineralogy, University of Amsterdam, The Netherlands.
Help on Name Pronunciation: Name Pronunciation: Westerveldite + Pronunciation Say WESTERVELDITE
Help on Synonym: Synonym: ICSD 30413
  PDF 12-799

Westerveldite Image

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Comments: Silvery metallic westerveldite grains in syenite rock.
Location: Ilimaussaq, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Westerveldite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5789:1:0.8929
Help on Cell Dimensions: Cell Dimensions: a = 3.457, b = 5.971, c = 5.332, Z = 4; V = 110.06 Den(Calc)= 7.96
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.604(1), 1.988(0.5), 2.083(0.25),

Physical Properties of Westerveldite

Help on Color: Color: Brownish white, Gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luster: Luster: Metallic

Optical Properties of Westerveldite

Help on RL Anisotrophism: RL Anisotrophism: Distinct in air, orange brown and bluish in oil.
Help on RL Pleochroism: RL Pleochroism: Distinct.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Westerveldite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   46.90   48.60 
 420 nm   46.30   48.50 
 440 nm   45.70   48.40 
 460 nm   44.90   48.00 
 480 nm   44.30   48.00 
 500 nm   43.70   47.80 
 520 nm   43.40   47.90 
 540 nm   43.40   47.90 
 560 nm   43.40   48.00 
 580 nm   43.50   48.00 
 600 nm   43.70   48.10 
 620 nm   44.10   48.30 
 640 nm   44.40   48.60 
 660 nm   44.90   48.90 
 680 nm   45.60   49.10 
 700 nm   46.20   49.40 
Calculated Relative Intensity Colors of Westerveldite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210%

Calculated Properties of Westerveldite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.20 gm/cc
note: Specific Gravity of Westerveldite =7.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0068925348
Boson Index = 0.9931074652
Help on Photoelectric: Photoelectric: PEWesterveldite = 55.89 barns/electron
U=PEWesterveldite x rElectron Density= 402.62 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Westerveldite is Not Radioactive

Westerveldite 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
  (02.08.19)Dana Group Westerveldite (Fe,Ni,Co)As Pnam 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.CC.15 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.15 Cherepanovite RhAs P nma 2/m 2/m 2/m
02.CC.15 Modderite (Co,Fe)As Pmcn 2/m 2/m 2/m
02.CC.15 Ruthenarsenite (Ru,Ni)As P nma 2/m 2/m 2/m
02.CC.15 Westerveldite (Fe,Ni,Co)As Pnam 2/m 2/m 2/m

Other Westerveldite 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 Westerveldite :
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

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Dana No: Strunz No: 02.CC.15





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