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Rammelsbergite Mineral Data
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General Rammelsbergite Information
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 Chemical Formula: |
NiAs2 |
| Composition: |
Molecular Weight = 208.53 gm |
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Nickel 28.14 % Ni |
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Arsenic 71.86 % As |
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______ |
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100.00 % |
| Empirical Formula: |
NiAs2 |
| Environment: |
In Ni and Co veins formed at moderate temperatures. |
| IMA Status: |
Valid Species (Pre-IMA) 1854 |
| Locality: |
Schneeberg District, Erzgebirge, Saxony, Germany. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the German chemist and mineralogist, K. F. Rammelsberg (1812-1899). |
| Name Pronunciation: |
Rammelsbergite + Pronunciation  |
| Synonym: |
ICSD 42571 |
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PDF 14-Nov |
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Rammelsbergite Image |
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Images:
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Rammelsbergite Crystallography
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| Axial Ratios: |
a:b:c =0.8269:1:0.6107 |
| Cell Dimensions: |
a = 4.78, b = 5.78, c = 3.53, Z = 2; V = 97.53 Den(Calc)= 7.10 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm |
| X Ray Diffraction: |
By Intensity(I/Io): 2.552(1), 2.476(0.9), 2.843(0.65), |
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Physical Properties of Rammelsbergite
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| Cleavage: |
{???} Indistinct |
| Color: |
Tin white, Reddish white. |
| Density: |
7.1 |
| Diaphaneity: |
Opaque |
| Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) |
| Hardness: |
5.5 - Knife Blade |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Metallic |
| Magnetism: |
Nonmagnetic |
| Streak: |
grayish black |
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Optical Properties of Rammelsbergite
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| RL Anisotrophism: |
Strong, especially in blues. |
| RL Color: |
White, pure. |
| RL Pleochroism: |
Weak, in yellow to pinkish hue and bluish white. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Rammelsbergite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
53.10 |
52.20 |
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| 420 nm |
54.20 |
54.20 |
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| 440 nm |
55.30 |
56.20 |
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| 460 nm |
56.00 |
57.60 |
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| 480 nm |
56.50 |
58.40 |
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| 500 nm |
56.60 |
58.70 |
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| 520 nm |
56.30 |
58.60 |
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| 540 nm |
56.00 |
58.20 |
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| 560 nm |
55.80 |
58.00 |
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| 580 nm |
55.80 |
57.80 |
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| 600 nm |
55.80 |
57.80 |
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| 620 nm |
55.70 |
57.60 |
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| 640 nm |
55.60 |
57.30 |
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| 660 nm |
55.60 |
57.00 |
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| 680 nm |
55.50 |
56.90 |
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| 700 nm |
55.40 |
56.80 |
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Calculated Relative Intensity Colors of Rammelsbergite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
| R1 |
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| R2 |
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Calculated Properties of Rammelsbergite
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| Electron Density: |
Bulk Density (Electron Density)=6.40 gm/cc
note: Specific Gravity of Rammelsbergite =7.10 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0031802946
Boson Index = 0.9968197054 |
| Photoelectric: |
PERammelsbergite = 63.48 barns/electron
U=PERammelsbergite x rElectron Density= 406.30 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rammelsbergite is Not Radioactive |
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Rammelsbergite Classification
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| Dana Class: |
02.12.02.12 (02)Sulfides - Including Selenides and Tellurides |
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(02.12)where Am Bn Xp, with (m+n):p=1:2 |
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(02.12.02)Marcasite Group (Orthorhombic: Pnnm) |
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02.12.02.01 Marcasite FeS2 Pnnm 2/m 2/m 2/m |
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02.12.02.02 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m |
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02.12.02.03 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m |
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02.12.02.04 Hastite? CoSe2 Pnnm 2/m 2/m 2/m |
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02.12.02.05 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m |
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02.12.02.06 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m |
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02.12.02.07 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m |
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02.12.02.08 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m |
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02.12.02.09 Lollingite FeAs2 Pnnm 2/m 2/m 2/m |
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02.12.02.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m |
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02.12.02.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m |
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02.12.02.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m |
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02.12.02.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m |
| Strunz Class: |
02.EB.15a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.E - Metal Sulfides, M:S � 1:2 |
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02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc. |
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02.EB.15a Clinosafflorite (Co,Fe,Ni)As2 P 21/n 2/m |
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02.EB.15a Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Lollingite FeAs2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Nisbite NiSb2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m |
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Other Rammelsbergite Information
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| References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Rammelsbergite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineral and Gemstone Kingdom
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Scandinavian mineral gallery
19 - WWW-MINCRYST
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Print or Cut-and-Paste your Rammelsbergite Specimen Label here :
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Rammelsbergite
NiAs2
Dana No: 02.12.02.12 Strunz No: 02.EB.15a
Locality:
Notes:
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