Gersdorffite Mineral Data + Say GERSDORFFITE


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General Gersdorffite Information
Help on Chemical Formula: Chemical Formula: NiAsS
Help on Composition: Composition: Molecular Weight = 165.68 gm
   Nickel   35.42 %  Ni
   Arsenic  45.22 %  As
   Sulfur   19.35 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: NiAsS
Help on Environment: Environment: In hydrothermal vein deposits formed at moderate tempertures.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1843
Help on Locality: Locality: Zinkwand, Schladming, Styria, Austria. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Herr von Gersdorff, owner of Schladming Mine, Austria.
Help on Synonym: Synonym: Gray nickel pyrites
  Nickel glance
 

Gersdorffite Image

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Gersdorffite

Comments: Massive to coarse-grained lead-gray gersdorffite crystals.
Location: Ait Ahmane Mine, Bou Azzer, Anti Atlas Mts., Morocco. Scale: Not Given.
© John Veevaert

Gersdorffite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 5.719, Z = 4; V = 187.05 Den(Calc)= 5.88
Help on Crystal System: Crystal System: Isometric - TetartoidalH-M Symbol (2 3) Space Group: P 213
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.545(1), 2.325(0.9), 1.716(0.8),
Help on Forms: Forms:

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Forms: [ 0 1 1] [ 1 1 1] [ 1 0 0]

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Bayliss P , American Mineralogist , 53 (1968) p.290-293, The crystal structure of disordered gersdorffite

View Additional jPOWD Structure files for Gersdorffite
[1] [2]
 

Physical Properties of Gersdorffite

Help on Cleavage: Cleavage: [100] Good, [010] Good, [001] Good
Help on Color: Color: Gray, Grayish black, Silver white, Tin white.
Help on Density: Density: 5.9 - 6.33, Average = 6.11
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: grayish black
 

Optical Properties of Gersdorffite

Help on RL Color: RL Color: White.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Gersdorffite in Air
λ R  ∑ R(λ) 
 400 nm   47.40   
 420 nm   46.60 
 440 nm   45.80 
 460 nm   45.40 
 480 nm   45.10 
 500 nm   45.00 
 520 nm   45.00 
 540 nm   45.00 
 560 nm   45.10 
 580 nm   45.30 
 600 nm   45.50 
 620 nm   45.90 
 640 nm   46.20 
 660 nm   46.50 
 680 nm   46.90 
 700 nm   47.30 
Calculated Relative Intensity Colors of Gersdorffite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 200%
R                  
 

Calculated Properties of Gersdorffite

Help on Electron Density: Electron Density:

relectron=5.47 gm/cc
note: rGersdorffite =5.88 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00545
Boson Index = 0.99455
Help on Photoelectric: Photoelectric:

PEGersdorffite = 47.24 barns/electron
U=PEGersdorffite x relectron= 258.17 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Gersdorffite is Not Radioactive
 

Gersdorffite Classification
Help on Dana Class: Dana Class: 2.12.3.2 (2)Sulfides - Including Selenides and Tellurides
  (2.12)where Am Bn Xp, with (m+n):p=1:2
  (2.12.3)Cobaltite Group (Cubic or pseudocubic crystals)
 
2.12.3.1 Cobaltite CoAsS P ca21 mm2
 
2.12.3.2 Gersdorffite NiAsS P 213 2 3
 
2.12.3.3 Ullmannite NiSbS P 213 2 3
 
2.12.3.4 Willyamite (Co,Ni)SbS P 213 2 3
 
2.12.3.5 Tolovkite IrSbS P 213 2 3
 
2.12.3.6 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3
 
2.12.3.7 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3
 
2.12.3.8 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3
 
2.12.3.9 Jolliffeite (Ni,Co)AsSe P a3 2/m 3
 
2.12.3.10 Padmaite PdBiSe P 213 2 3
 
2.12.3.11 Michenerite (Pd,Pt)BiTe P 213 2 3
 
2.12.3.12 Maslovite PtBiTe P 213 2 3
 
2.12.3.13 Testibiopalladite PdTe(Sb,Te) P 213 2 3
 
2.12.3.14 Changchengite! IrBiS P 213 2 3
 
2.12.3.15 Milotaite! PdSbSe P 21/3 2 3
 
2.12.3.16 IMA2004-047! PdAsSe Pa3 4/m 2/m 2/m
Help on Strunz Class: Strunz Class: II/D.18-20 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.18 - Cobaltite group, Cobaltite - Ullmannite - Tolovkite series
 
II/D.18-10 Cobaltite CoAsS P ca21 mm2
 
II/D.18-20 Gersdorffite NiAsS P 213 2 3
 
II/D.18-25 Jolliffeite (Ni,Co)AsSe P a3 2/m 3
 
II/D.18-30 Willyamite (Co,Ni)SbS P 213 2 3
 
II/D.18-40 Ullmannite NiSbS P 213 2 3
 
II/D.18-50 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3
 
II/D.18-60 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3
 
II/D.18-70 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3
 
II/D.18-80 Tolovkite IrSbS P 213 2 3
 

Other Gersdorffite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Gersdorffite :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Applied Mineralogy 6 -Athena 7 - Crocoite.com Mineral Locations 8 - EUROmin Project 9 -Google Images 10 -Google Scholar 11 -Handbook of Mineralogy (UofA) 12 - HyperPhysics 13 -MinDAT 14 -MinMax(Deutsch) 15 -MinMax(English) 16 -Mineralienatlas (Deutsch) 17 -QUT Mineral Atlas 18 - Scandinavian mineral gallery 19 - WWW-MINCRYST 20 -École des Mines de Paris

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Gersdorffite

NiAsS
Dana No: 2.12.3.2 Strunz No: II/D.18-20
Locality:

 

Notes:

 
 
   
 
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