Arsenolamprite
A valid IMA mineral species - grandfathered
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About Arsenolamprite
Formula:
As
Colour:
Grey-white.
Lustre:
Metallic
Hardness:
2
Specific Gravity:
5.3 - 5.5
Crystal System:
Orthorhombic
Name:
Named for its composition and for the Greek λαμπρός ("lampros") for "brilliant", in allusion to its luster.
Type Locality:
Polymorph of:
Unique Identifiers
Mindat ID:
312
Long-form identifier:
mindat:1:1:312:8
IMA Classification of Arsenolamprite
Approved, 'Grandfathered' (first described prior to 1959)
Classification of Arsenolamprite
1.CA.10
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
C : Metalloids and Nonmetals
A : Arsenic group elements
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
C : Metalloids and Nonmetals
A : Arsenic group elements
Dana 7th ed.:
1.3.1.2
1.3.2.1
1 : NATIVE ELEMENTS AND ALLOYS
3 : Semi-metals and non-metals
1 : NATIVE ELEMENTS AND ALLOYS
3 : Semi-metals and non-metals
1.34
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Asl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Arsenolamprite
Metallic
Transparency:
Opaque
Colour:
Grey-white.
Comment:
Alters to a dull black coating
Streak:
Black.
Hardness:
2 on Mohs scale
Cleavage:
Perfect
Perfect in one direction.
Perfect in one direction.
Density:
5.3 - 5.5 g/cm3 (Measured) 5.577 g/cm3 (Calculated)
Optical Data of Arsenolamprite
Anisotropism:
weak
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 420nm | 42.8% | 56.8% |
| 440nm | 43.6% | 55.4% |
| 460nm | 44.3% | 54.0% |
| 480nm | 44.7% | 52.8% |
| 500nm | 44.8% | 51.6% |
| 520nm | 44.6% | 50.5% |
| 540nm | 44.0% | 49.6% |
| 560nm | 43.1% | 48.7% |
| 580nm | 42.7% | 48.0% |
| 600nm | 42.6% | 47.4% |
| 620nm | 42.7% | 46.8% |
| 640nm | 43.0% | 46.3% |
| 660nm | 43.4% | 45.8% |
| 680nm | 43.8% | 45.5% |
| 700nm | 44.4% | 45.0% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 56.8%.
R1 shown in black, R2 shown in red
Chemistry of Arsenolamprite
Mindat Formula:
As
Element Weights:
| Element | % weight |
|---|---|
| As | 100.000 % |
Calculated from ideal end-member formula.
Elements listed:
Common Impurities:
Bi
Crystallography of Arsenolamprite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 3.63 Å, b = 4.45 Å, c = 10.96 Å
Ratio:
a:b:c = 0.816 : 1 : 2.463
Unit Cell V:
177.04 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Needles to 8 mm, foliated, radial aggregates of plates, massive.
Comment:
On synthetic material. Non-standard space group Bmab.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
|---|---|---|---|---|---|---|---|
| 0014996 | Arsenolamprite | Smith P M, Leadbetter A J, Apling A J (1974) The structures of orthorhombic and vitrous arsenic Philosophical Magazine 31 57-64 | 1974 | synthetic | 0 | 293 | |
| 0011251 | Arsenolamprite | Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 239-444 | 1963 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.76 Å | (10) |
| 3.48 Å | (6) |
| 2.745 Å | (8) |
| 2.72 Å | (10) |
| 2.230 Å | (5) |
| 1.875 Å | (7) |
| 1.730 Å | (7) |
Comments:
Alacrán mine, Chile.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
Carbonate rocks, calcite veins
Type Occurrence of Arsenolamprite
Synonyms of Arsenolamprite
Arsenwismut (in part)
Other Language Names for Arsenolamprite
Dutch:Arsenolampriet
French:Arsénolamprite
German:Arsenolamprit
Arsenglanz
Arsenglanz
Norwegian:Arsenolampritt
Russian:Арсеноламприт
Simplified Chinese:自然砷鉍
Spanish:Arsenolamprita
Common Associates
Associations Based on Photo Data:
| 52 photos of Arsenolamprite associated with Native Arsenic | As |
| 24 photos of Arsenolamprite associated with Native Silver | Ag |
| 3 photos of Arsenolamprite associated with Proustite | Ag3AsS3 |
| 2 photos of Arsenolamprite associated with Realgar | As4S4 |
| 2 photos of Arsenolamprite associated with Quartz | SiO2 |
| 2 photos of Arsenolamprite associated with Pyrite | FeS2 |
| 1 photo of Arsenolamprite associated with Calcite | CaCO3 |
| 1 photo of Arsenolamprite associated with Xanthoconite | Ag3AsS3 |
| 1 photo of Arsenolamprite associated with Arsenolite | As2O3 |
Related Minerals - Strunz-mindat Grouping
| 1.CA.05 | Native Antimony | Sb |
| 1.CA.05 | Native Arsenic | As |
| 1.CA.05 | Native Bismuth | Bi |
| 1.CA.05 | Stibarsen | AsSb |
| 1.CA.10 | Pararsenolamprite | (As,Sb) |
| 1.CA.15 | Paradocrasite | Sb2(Sb,As)2 |
| 1.CA.20 | Native Phosphorus | P4 |
Other Information
Health Risks:
Comprised of arsenic - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest.
Internet Links for Arsenolamprite
mindat.org URL:
https://www.mindat.org/min-312.html
Please feel free to link to this page.
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References for Arsenolamprite
Reference List:
Ramdohr, Paul (1969) The Ore Minerals and their Intergrowths. Pergamon Press, Oxford. 1174pp. doi:10.1016/c2013-0-10027-x
Clark, A. H. (1970) Arsenolamprite confirmed from the Copiapó area, northern Chile. Mineralogical Magazine, 37 (290). 732-733 doi:10.1180/minmag.1970.037.290.15
Smith, P. M., Leadbetter, A. J., Apling, A. J. (1975) The structures of orthorhombic and vitreous arsenic. Philosophical Magazine, 31 (1). 57-64 doi:10.1080/14786437508229285
Localities for Arsenolamprite
Showing 30 localities.
symbol to view information about a locality.
The 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.
Austria | |
| Haditsch (1964) |
Chile | |
| RWMW specimen |
| Clark (1970) +2 other references |
Czech Republic | |
| Bulletin Nat. Mus. in Prague (2007) |
| Johan et al. (1961) |
| Hloušek et al. (2002) |
| Rojík (2005) |
France | |
| Mineralogical Society of America - ... |
| Wittern +1 other reference |
| This mine worked the same vein as Gabe ... +2 other references | |
Germany | |
| Grundmann (1987) |
| Weiß (1990) |
| |
| |
| |
| Fettel (1986) |
| Peter Haas collection |
| Mineralogical Society of America - ... |
| https://www.mindat.org/photo-871542.html |
| |
| A. Breithaupt (1823) |
Greece | |
| Rieck et al. (1999) |
Mozambique | |
| Thomas et al. (2010) |
North Macedonia | |
| Đorđević et al. (2017) |
Norway | |
| Larsen (2019) |
Poland | |
| Ł. Kruszewski (PXRD data) +1 other reference |
| Ł. Kruszewski PXRD data (to be published soon) +3 other references | |
South Korea | |
| Ahn et al. (2005) |
Switzerland | |
| |
USA | |
| Castor et al. (2004) |
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Niederschlema, Bad Schlema, Aue-Bad Schlema, Erzgebirgskreis, Saxony, Germany