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Schollhornite Mineral Data

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General Schollhornite Information

Help on Chemical  Formula: Chemical Formula: Na0.3CrS2•(H2O)
Help on Composition: Composition: Molecular Weight = 141.04 gm
   Sodium     4.89 %  Na
   Chromium  36.87 %  Cr
   Hydrogen   1.43 %  H
   Sulfur    45.47 %  S
   Oxygen    11.34 %  O
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Na0.3CrS2•(H2O)
Help on Environment: Environment: Extra-terrestrial meteorite.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Waethering product of caswellsilverite in the Norton County enstatite achondrite. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Robert Schollhorn, German chemist.
Help on Name Pronunciation: Name Pronunciation: Schollhornite + Pronunciation Say SCHOLLHORNITE
Help on Synonym: Synonym: Schoellhornite
 

Schollhornite Image

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  Schollhornite   Daubreelite   Caswellsilverite

Comments: Polished section (PPL) of schiillhornite (Sh), coexisting with caswellsilverite (Cw), ferromagnesian alabandite (Ab) and daubreelite (Db). (AmMin, v70:638).
Location: Norton County (Kansas-Nebraska) enstatite achondrite meteorite. Scale: Scale bar is 0.08 mm.
© American Mineralogist

Schollhornite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:8.01204
Help on Cell Dimensions: Cell Dimensions: a = 3.32, c = 26.6, Z = 3; V = 253.92 Den(Calc)= 2.77
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.85(1), 2.53(0.5), 2.8(0.5),
 

Physical Properties of Schollhornite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Gray.
Help on Density: Density: 2.7
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Metallic
 

Optical Properties of Schollhornite

Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on RL Color: RL Color: Gray in air, bluish gray in oil.
Help on RL Pleochroism: RL Pleochroism: Distinct, white with yellowish tint to light gray with bluish or greenish tint.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Schollhornite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 420 nm   15.40   17.00 
   
 440 nm   16.00   17.40 
 460 nm   16.60   19.30 
 480 nm   16.50   19.30 
 500 nm   16.40   19.40 
 520 nm   16.20   19.30 
 540 nm   16.00   19.30 
 560 nm   15.80   19.30 
 580 nm   15.50   19.30 
 600 nm   15.20   19.20 
 620 nm   15.20   19.10 
 640 nm   15.00   19.00 
 660 nm   15.10   19.10 
 680 nm   15.10   19.40 
 700 nm   14.80   19.00 
Calculated Relative Intensity Colors of Schollhornite in Air
Relative
Intensity
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 580%
R1                        
R2                        
 

Calculated Properties of Schollhornite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.72 gm/cc
note: Specific Gravity of Schollhornite =2.77 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PESchollhornite = 10.67 barns/electron
U=PESchollhornite x rElectron Density= 29.05 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schollhornite is Not Radioactive
 

Schollhornite Classification

Help on  Dana Class: Dana Class: 02.09.17.02 (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.17)Caswellsilverite Group
 
02.09.17.01 Caswellsilverite NaCrS2 R 3m 3 2/m
 
02.09.17.02 Schollhornite Na0.3CrS2•(H2O) R 3m ? 3m
 
02.09.17.03 Cronusite! Ca0.2(H2O)2CrS2 Rm, R 3m or R 32 Trig
Help on  Strunz Class: Strunz Class: 02.FB.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O
  02.FB -With Alkalies (without Cl, etc.)
 
02.FB.05 Caswellsilverite NaCrS2 R 3m 3 2/m
 
02.FB.05 Schollhornite Na0.3CrS2•(H2O) R 3m ? 3m
 
02.FB.05 Cronusite! Ca0.2(H2O)2CrS2 Rm, R 3m or R 32 Trig
 

Other Schollhornite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Schollhornite :
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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Schollhornite

Na0.3CrS2•(H2O)
Dana No: 02.09.17.02 Strunz No: 02.FB.05
Locality:

 

Notes:

 

 
   
 


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