Rammelsbergite Mineral Data + Say RAMMELSBERGITE


General Rammelsbergite Information
Help on Chemical Formula: Chemical Formula: NiAs2
Help on Composition: Composition: Molecular Weight = 208.53 gm
   Nickel   28.14 %  Ni
   Arsenic  71.86 %  As
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: NiAs2
Help on Environment: Environment: In Ni and Co veins formed at moderate temperatures.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1854
Help on Locality: Locality: Schneeberg District, Erzgebirge, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the German chemist and mineralogist, K. F. Rammelsberg (1812-1899).
Help on Synonym: Synonym: ICSD 42571
  PDF 14-Nov
 

Rammelsbergite Image

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Rammelsbergite

Comments: Dull gray metallic botryoidal rammelsbergite aggregate with crystalline surface.
Location: Hudson Bay Mine, Rusty Lake, Gowganda, Ontario, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rammelsbergite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.8269:1:0.6107
Help on Cell Dimensions: Cell Dimensions: a = 4.78, b = 5.78, c = 3.53, Z = 2; V = 97.53 Den(Calc)= 7.10
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.552(1), 2.476(0.9), 2.843(0.65),
 

Physical Properties of Rammelsbergite

Help on Cleavage: Cleavage: [???] Indistinct
Help on Color: Color: Tin white, Reddish white.
Help on Density: Density: 7.1
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
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 Rammelsbergite

Help on RL Anisotrophism: RL Anisotrophism: Strong, especially in blues.
Help on RL Color: RL Color: White, pure.
Help on RL Pleochroism: RL Pleochroism: Weak, in yellow to pinkish hue and bluish white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Rammelsbergite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   53.10   52.20 
   
 420 nm   54.20   54.20 
 440 nm   55.30   56.20 
 460 nm   56.00   57.60 
 480 nm   56.50   58.40 
 500 nm   56.60   58.70 
 520 nm   56.30   58.60 
 540 nm   56.00   58.20 
 560 nm   55.80   58.00 
 580 nm   55.80   57.80 
 600 nm   55.80   57.80 
 620 nm   55.70   57.60 
 640 nm   55.60   57.30 
 660 nm   55.60   57.00 
 680 nm   55.50   56.90 
 700 nm   55.40   56.80 
Calculated Relative Intensity Colors of Rammelsbergite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160%
R1                  
R2                  
 

Calculated Properties of Rammelsbergite

Help on Electron Density: Electron Density:

relectron=6.40 gm/cc
note: rRammelsbergite =7.10 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00318
Boson Index = 0.99682
Help on Photoelectric: Photoelectric:

PERammelsbergite = 63.48 barns/electron
U=PERammelsbergite x relectron= 406.30 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Rammelsbergite is Not Radioactive
 

Rammelsbergite Classification
Help on Dana Class: Dana Class: 2.12.2.12 (2)Sulfides - Including Selenides and Tellurides
  (2.12)where Am Bn Xp, with (m+n):p=1:2
  (2.12.2)Marcasite Group (Orthorhombic: Pnnm)
 
2.12.2.1 Marcasite FeS2 Pnnm 2/m 2/m 2/m
 
2.12.2.2 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.3 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m
 
2.12.2.4 Hastite CoSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.5 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m
 
2.12.2.6 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.7 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.8 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.9 Lollingite FeAs2 Pnnm 2/m 2/m 2/m
 
2.12.2.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m
 
2.12.2.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m
 
2.12.2.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: II/D.23-30 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.23 - Löllingite - Costibite series
 
II/D.23-10 Lollingite FeAs2 Pnnm 2/m 2/m 2/m
 
II/D.23-20 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m
 
II/D.23-30 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m
 
II/D.23-40 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m
 
II/D.23-50 Nisbite NiSb2 Pnnm 2/m 2/m 2/m
 
II/D.23-60 Costibite CoSbS P mn21 mm2
 
II/D.23-70 Oenite! CoSbAs Unk Ortho
 

Other Rammelsbergite 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 Rammelsbergite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 - Franklin Minerals(Dunn) 8 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 - Mineral and Gemstone Kingdom 15 -Mineralienatlas (Deutsch) 16 -QUT Mineral Atlas 17 - Scandinavian mineral gallery 18 - WWW-MINCRYST 19 -École des Mines de Paris

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Rammelsbergite

NiAs2
Dana No: 2.12.2.12 Strunz No: II/D.23-30
Locality:

 

Notes:

 
 
   
 
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