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Rammelsbergite

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Karl Rammelsberg
Formula:
NiAs2
System:
Orthorhombic
Colour:
Tin white with faint ...
Lustre:
Metallic
Hardness:
5½ - 6
Name:
Named in 1855 by James D. Dana in honor of Karl Friedrich August Rammelsberg [April 1, 1813 Berlin, Germany (Prussia)– December 28, 1899 Gross Lichterfelde, Germany], German chemist and mineralogist who taught at University of Berlin and at the Royal Industrial Institute. He published many significant books on systematic mineralogy.
Isostructural with:
This page provides mineralogical data about Rammelsbergite.

Classification of Rammelsbergite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
2.EB.15a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
2.12.2.12

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
3.11.28

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
11 : Sulphides etc. of Ni
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Type Occurrence of Rammelsbergite

General Appearance of Type Material:
Bright silvery metallic masses
Year of Discovery:
1854

Occurrences of Rammelsbergite

Geological Setting:
In moderate temperature hydrothermal veins

Physical Properties of Rammelsbergite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Tin white with faint pinkish hue
Streak:
Grayish black
Hardness (Mohs):
5½ - 6
Hardness (Vickers):
VHN100=630 - 758 kg/mm2
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {101}
Fracture:
Irregular/Uneven
Density:
7.0 - 7.2 g/cm3 (Measured)    7.091 g/cm3 (Calculated)

Crystallography of Rammelsbergite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnnm
Space Group Setting:
Pnnm
Cell Parameters:
a = 4.759Å, b = 5.797Å, c = 3.539Å
Ratio:
a:b:c = 0.821 : 1 : 0.61
Unit Cell Volume:
V 97.63 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Usually massive. Prismatic crystals are rare.
Twinning:
On {101}
X-Ray Powder Diffraction Data:
d-spacingIntensity
2.82 (100)
2.52 (90)
2.42 (60)
2.00 (30)
1.84 (70)
1.75 (30)
1.66 (30)
1.21 (100)
Comments:
ICDD 15-441

Optical Data of Rammelsbergite

Type:
Anisotropic
Anisotropism:
Strong, especially in blues
Reflectivity:
nmR=6.0-58.2 (540 nm%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 6.0-58.2 (540 nm%.
Colour in reflected light:
White
Pleochroism:
Weak
Comments:
In yellowish to pinkish hue and bluish white

Chemical Properties of Rammelsbergite

Formula:
NiAs2
Essential elements:
All elements listed in formula:
Common Impurities:
Co,Se,S,Fe,Sb

Relationship of Rammelsbergite to other Species

Other Members of Group:
2.EB.05aAurostibiteAuSb2
2.EB.05bBambollaiteCu(Se,Te)2
2.EB.05aCattieriteCoS2
2.EB.05aErlichmaniteOsS2
2.EB.05aFukuchiliteCu3FeS8
2.EB.05aGeversitePtSb2
2.EB.05aHaueriteMnS2
2.EB.05aInsizwaitePt(Bi,Sb)2
2.EB.05aKrut'aiteCuSe2
2.EB.05aLauriteRuS2
2.EB.05aPenroseite(Ni,Co,Cu)Se2
2.EB.05aPyriteFeS2
2.EB.05aSperrylitePtAs2
2.EB.05aTrogtaliteCoSe2
2.EB.05aVaesiteNiS2
2.EB.05aVillamaninite(Cu,Ni,Co,Fe)S2
2.EB.05aDzharkeniteFeSe2
2.EB.05aGaotaiiteIr3Te8
2.EB.10bAlloclasiteCo1-xFexAsS
2.EB.10dCostibiteCoSbS
2.EB.10aFerroseliteFeSe2
2.EB.10aFrohbergiteFeTe2
2.EB.10cGlaucodot(Co0.50Fe0.50)AsS
2.EB.10aKulleruditeNiSe2
2.EB.10aMarcasiteFeS2
2.EB.10aMattagamiteCoTe2
2.EB.10eParacostibiteCoSbS
2.EB.10ePararammelsbergiteNiAs2
2.EB.10fOeniteCoSbAs
2.EB.15aAnduoite(Ru,Os)As2
2.EB.15aClinosaffloriteCoAs2
2.EB.15aLöllingiteFeAs2
2.EB.15aNisbiteNiSb2
2.EB.15aOmeiite(Os,Ru)As2
2.EB.15cPaxiteCuAs2
2.EB.15aSafflorite(Co,Ni,Fe)As2
2.EB.15bSeinäjokite(Fe,Ni)(Sb,As)2
2.EB.20ArsenopyriteFeAsS
2.EB.20GudmunditeFeSbS
2.EB.20Osarsite(Os,Ru)AsS
2.EB.20Ruarsite(Ru,Os)AsS
2.EB.25CobaltiteCoAsS
2.EB.25GersdorffiteNiAsS
2.EB.25Hollingworthite(Rh,Pt,Pd)AsS
2.EB.25Irarsite(Ir,Ru,Rh,Pt)AsS
2.EB.25JolliffeiteNiAsSe
2.EB.25KrutoviteNiAs2
2.EB.25MaslovitePtBiTe
2.EB.25MicheneritePdBiTe
2.EB.25PadmaitePdBiSe
2.EB.25PlatarsitePtAsS
2.EB.25TestibiopalladitePdTe(Sb,Te)
2.EB.25TolovkiteIrSbS
2.EB.25UllmanniteNiSbS
2.EB.25Willyamite(Co,Ni)SbS
2.EB.25ChangchengiteIrBiS
2.EB.25MayingiteIrBiTe
2.EB.25Hollingsworthite
2.EB.25KalungaitePdAsSe
2.EB.25MilotaitePdSbSe
2.EB.30UrvantsevitePd(Bi,Pb)2
2.EB.35RheniiteReS2
3.11.1HeazlewooditeNi3S2
3.11.2Godlevskite(Ni,Fe)9S8
3.11.3MilleriteNiS
3.11.4PolydymiteNi2+Ni23+S4
3.11.5VaesiteNiS2
3.11.6ShanditeNi3Pb2S2
3.11.7DonharrisiteNi8Hg3S9
3.11.8ViolariteFe2+Ni23+S4
3.11.9Pentlandite(Fe,Ni)9S8
3.11.10Bravoite(Fe,Ni)S2
3.11.11SiegeniteCoNi2S4
3.11.12FletcheriteCu(Ni,Co)2S4
3.11.13Villamaninite(Cu,Ni,Co,Fe)S2
3.11.14Mäkineniteγ-NiSe
3.11.15Sederholmitebeta-NiSe
3.11.16TrüstedtiteNi3Se4
3.11.17WilkmaniteNi3Se4
3.11.18KulleruditeNiSe2
3.11.19Penroseite(Ni,Co,Cu)Se2
3.11.20TyrrelliteCu(Co3+,Ni3+)2Se4
3.11.21ImgreiteNiTe (?)
3.11.22MeloniteNiTe2
3.11.23KitkaiteNiTeSe
3.11.24Dienerite
3.11.25OrceliteNi5-xAs2, x ~ 0.25
3.11.26MaucheriteNi11As8
3.11.27NickelineNiAs
3.11.29PararammelsbergiteNiAs2
3.11.30NickelskutteruditeNiAs3-x
3.11.31OregoniteNi2FeAs2
3.11.32Westerveldite(Fe,Ni,Co)As
3.11.33Langisite(Co,Ni)As
3.11.34GersdorffiteNiAsS
3.11.35JolliffeiteNiAsSe
3.11.36BreithauptiteNiSb
3.11.38UllmanniteNiSbS
3.11.39Willyamite(Co,Ni)SbS

Other Names for Rammelsbergite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Rammelsbergite

Reference List:
Hofmann (1832), Ann. Phys.: 25: 491.

Breithaupt (1845), Ann. Phys.: 64: 184.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 309-310.

American Mineralogist (1963): 48: 271.

Radcliffe, D. (1967): Some properties of rammelsbergite and pararammelsbergite. Can. Mineral. 9, 128-131.

Kjekshus, A., Rakke, T., Andresen, A. (1974): Compounds of the marcasite type crystal structure. IX. Structural data for FeAs2, FeSe2, NiAs2, NiSb2, and CuSe2. Acta Chemica Scandinavica, A28, 996-1000.

Kjekshus, A., Peterzéns, P. G., Rakke, T., Andresen, A. F. (1979): Compounds with the marcasite type crystal structure. XIII. Structural and magnetic properties of CrtFe1-tAs2, CrtFe1-tSb2, Fe1-tNitAs2 and Fe1-t NitSb2. Acta Chemica Scandinavica, A33, 469-480.

Gritzenko, Y. D., Spiridonov, E. M. (2005): Minerals of continuous series rammelsbergite—loellingite and rammelsbergite—safflorite in metamorphic—hydrothermal veins of Norilsk ore field. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva, 134 (1), 53-68.

Internet Links for Rammelsbergite

Specimens:
The following Rammelsbergite specimens are currently listed for sale on minfind.com.

Localities for Rammelsbergite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Mineral and/or Locality  
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