Rammelsbergite
A valid IMA mineral species - grandfathered
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About Rammelsbergite
Formula:
NiAs2
Colour:
Tin white with faint pinkish hue
Lustre:
Metallic
Hardness:
5½ - 6
Specific Gravity:
7.0 - 7.2
Crystal System:
Orthorhombic
Member of:
Name:
Named in 1845 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 the University of Berlin and at the Royal Industrial Institute. He published many significant books on systematic mineralogy.
Type Locality:
Polymorph of:
Isostructural with:
The high-temperature polymorph of NiAs2; pararammelsbergite is the low-temperature polymorph (Fleet, 1972).
Compare, e.g., nickeline and the (now approved / redefined) dienerite.
Compare, e.g., nickeline and the (now approved / redefined) dienerite.
Unique Identifiers
Mindat ID:
3357
Long-form identifier:
mindat:1:1:3357:8
Similar Names
| Rammelsbergite (of Haidinger) | A synonym of 'Chloanthite' |
IMA Classification of Rammelsbergite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ni3+(As2)3-
Classification of Rammelsbergite
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 : 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
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
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Rmb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Rmb | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Rammelsbergite
Metallic
Transparency:
Opaque
Colour:
Tin white with faint pinkish hue
Streak:
Grayish black
Hardness:
5½ - 6 on Mohs scale
Hardness:
VHN100=630 - 758 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {101}
Good on {101}
Fracture:
Irregular/Uneven
Density:
7.0 - 7.2 g/cm3 (Measured) 7.091 g/cm3 (Calculated)
Optical Data of Rammelsbergite
Anisotropism:
Strong, especially in blues
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 56.1% | 59.8% |
| 420nm | 56.6% | 60.2% |
| 440nm | 56.8% | 61.0% |
| 460nm | 56.6% | 61.1% |
| 480nm | 56.1% | 60.9% |
| 500nm | 56.2% | 60.8% |
| 520nm | 56.5% | 60.8% |
| 540nm | 56.8% | 60.9% |
| 560nm | 57.0% | 60.9% |
| 580nm | 57.0% | 60.9% |
| 600nm | 56.9% | 60.6% |
| 620nm | 56.8% | 60.1% |
| 640nm | 56.6% | 59.6% |
| 660nm | 56.4% | 58.9% |
| 680nm | 56.6% | 58.5% |
| 700nm | 56.7% | 58.0% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 61.1%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White
Pleochroism:
Weak
Comments:
In yellowish to pinkish hue and bluish white
Chemistry of Rammelsbergite
Mindat Formula:
NiAs2
Elements listed:
Common Impurities:
Co,Se,S,Fe,Sb
Crystallography of Rammelsbergite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnnm
Setting:
Pnnm
Cell Parameters:
a = 4.759 Å, b = 5.797 Å, c = 3.539 Å
Ratio:
a:b:c = 0.821 : 1 : 0.61
Unit Cell V:
97.63 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Usually massive. Prismatic crystals are rare.
Twinning:
On {101}
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0011957 | Rammelsbergite | Kjekshus A, Peterzens 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-tNitSb2 Acta Chemica Scandinavica A33 469-480 | 1979 | synthetic | 0 | 293 | |
| 0011937 | Rammelsbergite | 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 | 1974 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.82 Å | (100) |
| 2.52 Å | (90) |
| 2.42 Å | (60) |
| 2.00 Å | (30) |
| 1.84 Å | (70) |
| 1.75 Å | (30) |
| 1.66 Å | (30) |
| 1.21 Å | (100) |
Comments:
ICDD 15-441
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
In moderate temperature hydrothermal veins
Type Occurrence of Rammelsbergite
General Appearance of Type Material:
Bright silvery metallic masses
Synonyms of Rammelsbergite
Other Language Names for Rammelsbergite
Dutch:Rammelsbergiet
German:Rammelsbergit
Russian:Раммельсбергит
Simplified Chinese:斜方砷镍矿
Spanish:Niquel Blanco
Rammelsbergita
Rammelsbergita
Varieties of Rammelsbergite
Relationship of Rammelsbergite to other Species
Member of:
Other Members of Löllingite Group:
| Alloclasite | Co1-xFexAsS | Mon. 2 : P21 |
| Anduoite | RuAs2 | Orth. |
| Clinosafflorite | CoAs2 | Mon. 2/m : P21/m |
| Costibite | CoSbS | Orth. mm2 : Pmn21 |
| Löllingite | FeAs2 | Orth. mmm(2/m2/m2/m) : Pnnm |
| Nisbite | NiSb2 | Orth. mmm(2/m2/m2/m) : Pnnm |
| Oenite | CoSbAs | Orth. |
| Omeiite | OsAs2 | Orth. |
| Paracostibite | CoSbS | Orth. mmm(2/m2/m2/m) : Pbca |
| Pararammelsbergite | NiAs2 | Orth. mmm(2/m2/m2/m) : Pbca |
| Safflorite | (Co,Ni,Fe)As2 | Orth. mmm(2/m2/m2/m) : Pnnm |
| 'UM1998-01-AsSb:CoFeNi' | (Fe,Ni)SbAs |
Common Associates
Associations Based on Photo Data:
| 312 photos of Rammelsbergite associated with Nickeline | NiAs |
| 310 photos of Rammelsbergite associated with Nickelskutterudite | NiAs3 |
| 302 photos of Rammelsbergite associated with Quartz | SiO2 |
| 194 photos of Rammelsbergite associated with Native Bismuth | Bi |
| 119 photos of Rammelsbergite associated with Calcite | CaCO3 |
| 92 photos of Rammelsbergite associated with Bismuthinite | Bi2S3 |
| 87 photos of Rammelsbergite associated with Pyrite | FeS2 |
| 82 photos of Rammelsbergite associated with Baryte | BaSO4 |
| 76 photos of Rammelsbergite associated with Dolomite | CaMg(CO3)2 |
| 68 photos of Rammelsbergite associated with Skutterudite | CoAs3 |
Related Minerals - Strunz-mindat Grouping
| 2.EB. | Selenolaurite | RuSe2 |
| 2.EB. | Andrieslombaardite | RhSbS |
| 2.EB. | Iridarsenite | (Ir,Ru)As2 |
| 2.EB. | Kanatzidisite | (SbBiS3)2Te2 |
| 2.EB.05a | Vaesite | NiS2 |
| 2.EB.05a | Hauerite | MnS2 |
| 2.EB.05a | Laurite | RuS2 |
| 2.EB.05a | Gaotaiite | Ir3Te8 |
| 2.EB.05a | Penroseite | (Ni,Co,Cu)Se2 |
| 2.EB.05a | Fukuchilite | Cu3FeS8 |
| 2.EB.05a | Villamanínite | (Cu,Ni,Co,Fe)S2 |
| 2.EB.05a | Erlichmanite | OsS2 |
| 2.EB.05a | Sperrylite | PtAs2 |
| 2.EB.05a | Geversite | PtSb2 |
| 2.EB.05a | Cattierite | CoS2 |
| 2.EB.05a | Aurostibite | AuSb2 |
| 2.EB.05a | Trogtalite | CoSe2 |
| 2.EB.05a v | 'Cayeuxite' | |
| 2.EB.05a | Kruťaite | CuSe2 |
| 2.EB.05a | Pyrite | FeS2 |
| 2.EB.05a | Insizwaite | PtBi2 |
| 2.EB.05b | Bambollaite | Cu(Se,Te)2 |
| 2.EB.05a | Dzharkenite | FeSe2 |
| 2.EB.10a | Marcasite | FeS2 |
| 2.EB.10e | Paracostibite | CoSbS |
| 2.EB.10f | Oenite | CoSbAs |
| 2.EB.10e | Pararammelsbergite | NiAs2 |
| 2.EB.10a | Mattagamite | CoTe2 |
| 2.EB.10a | Frohbergite | FeTe2 |
| 2.EB.10d | Costibite | CoSbS |
| 2.EB.10b | Alloclasite | Co1-xFexAsS |
| 2.EB.10c | Glaucodot | (Co0.50Fe0.50)AsS |
| 2.EB.10a | Petříčekite | CuSe2 |
| 2.EB.10a | Kullerudite | NiSe2 |
| 2.EB.10a | Ferroselite | FeSe2 |
| 2.EB.15b | Seinäjokite | FeSb2 |
| 2.EB.15a | Clinosafflorite | CoAs2 |
| 2.EB.15c | Paxite | CuAs2 |
| 2.EB.15a | Nisbite | NiSb2 |
| 2.EB.15a | Löllingite | FeAs2 |
| 2.EB.15a | Safflorite | (Co,Ni,Fe)As2 |
| 2.EB.15a | Omeiite | OsAs2 |
| 2.EB.15a | Anduoite | RuAs2 |
| 2.EB.20 | Arsenopyrite | FeAsS |
| 2.EB.20 | Ruarsite | (Ru,Os)AsS |
| 2.EB.20 | Osarsite | (Os,Ru)AsS |
| 2.EB.20 | Gudmundite | FeSbS |
| 2.EB.25 | Mayingite | IrBiTe |
| 2.EB.25 | Maslovite | PtBiTe |
| 2.EB.25 | Paragersdorffite | Ni(As,S)2 |
| 2.EB.25 | Orthogersdorffite | NiAsS |
| 2.EB.25 | Sulfopadmaite | PdBiS |
| 2.EB.25 | Jolliffeite | NiAsSe |
| 2.EB.25 | Cobaltite | CoAsS |
| 2.EB.25 | Guixiangite | NiBiS |
| 2.EB.25 | Testibiopalladite | PdSbTe |
| 2.EB.25 va | 'Antimony-bearing Gersdorffite' | Ni(As,Sb)S |
| 2.EB.25 | Kalungaite | PdAsSe |
| 2.EB.25 | Hollingworthite | (Rh,Pt,Pd)AsS |
| 2.EB.25 | Michenerite | PdBiTe |
| 2.EB.25 | Gersdorffite | NiAsS |
| 2.EB.25 | Milotaite | PdSbSe |
| 2.EB.25 | Tolovkite | IrSbS |
| 2.EB.25 | 'Platarsite' | Pt(As,S)2 |
| 2.EB.25 | Willyamite | CoSbS |
| 2.EB.25 | Changchengite | IrBiS |
| 2.EB.25 | Kvačekite | NiSbSe |
| 2.EB.25 | Krutovite | NiAs2 |
| 2.EB.25 | Padmaite | PdBiSe |
| 2.EB.25 | Ullmannite | NiSbS |
| 2.EB.25 | Irarsite | (Ir,Ru,Rh,Pt)AsS |
| 2.EB.30 | Urvantsevite | Pd(Bi,Pb)2 |
| 2.EB.35 | Rheniite | ReS2 |
Fluorescence of Rammelsbergite
Not fluorescent
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.
Internet Links for Rammelsbergite
mindat.org URL:
https://www.mindat.org/min-3357.html
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References for Rammelsbergite
Reference List:
Kjekshus, Arne, Rakke, Trond, Andresen, Arne F., Southern, J. T. (1974) Compounds with the Marcasite Type Crystal Structure. IX. Structural Data for FeAs2, FeSe2, NiAs2, NiSb2, and CuSe2. Acta Chemica Scandinavica, 28. 996-1000 doi:10.3891/acta.chem.scand.28a-0996
Kjekshus, Arne; Peterzéns, Per G.; Rakke, Trond; Andresen, Arne F.; Hoyer, Eberhard; Spiridonov, V. P.; Strand, T. G. (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 doi:10.3891/acta.chem.scand.33a-0469
Localities for Rammelsbergite
Showing 322 localities.
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
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Oberschlema, Bad Schlema, Aue-Bad Schlema, Erzgebirgskreis, Saxony, Germany