Duranusite (original) (raw)
A valid IMA mineral species
About DuranusiteHide
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Colour:
Grey black, translucent dark red in very tiny splinters
Specific Gravity:
4.50 (Calculated)
Crystal System:
Orthorhombic
Name:
Named by Zdenek Johan, Claude Laforêt, Paul Picot and Jean Feraud in 1973 for the type locality, the small community of Duranus, France.
A rare black sulphide mineral.
Layered structure, related to that of arsenolamprite. The unit cell has 8 As and 2 S atoms. There are two types of corrugated layers - As2 and As2S - stacked along [010].
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:1333:4
b0be81a6-1ae9-4e3b-b797-11a41596ffb2
IMA Classification of DuranusiteHide
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Classification of DuranusiteHide
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2.FA.05
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
A : With As, (Sb), S
2.1.4.1
2 : SULFIDES
1 : AmXp, with m:p > 3:1
3.7.2
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
7 : Sulphides etc. of V, As, Sb and Bi
Mineral SymbolsHide
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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.
Symbol | Source | Reference |
---|---|---|
Du | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Du | 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 DuranusiteHide
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Colour:
Grey black, translucent dark red in very tiny splinters
Hardness:
VHN25=58 kg/mm2 - Vickers
Density:
4.50 g/cm3 (Calculated)
Optical Data of DuranusiteHide
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Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
400nm | 39.0% | 42.0% |
420nm | 36.8% | 39.4% |
440nm | 34.6% | 36.8% |
460nm | 33.0% | 34.8% |
480nm | 32.1% | 33.6% |
500nm | 31.4% | 32.7% |
520nm | 30.8% | 32.2% |
540nm | 30.4% | 31.8% |
560nm | 30.0% | 31.5% |
580nm | 29.6% | 31.0% |
600nm | 29.1% | 30.6% |
620nm | 28.7% | 30.3% |
640nm | 28.4% | 30.0% |
660nm | 28.0% | 29.7% |
680nm | 27.6% | 29.3% |
700nm | 27.1% | 29.0% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 42.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray white
Chemistry of DuranusiteHide
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Crystallography of DuranusiteHide
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Crystal System:
Orthorhombic
Class (H-M):
m m m _(_2/_m_2/_m_2/m ) - Dipyramidal
Cell Parameters:
a = 3.576(2) Å, b = 6.759(2) Å, c = 10.074(5) Å
Ratio:
a:b:c = 0.529 : 1 : 1.49
Unit Cell V:
243.49 ų (Calculated from Unit Cell)
Morphology:
Small polycrystalline grains, fibers, wiry aggregates.
Comment:
Bonazzi et al. (2016) give a = 3.611(5), b 6.755(8), c = 10.10(1) Å.
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.919 Å | (100) |
5.620 Å | (90) |
5.037 Å | (90) |
1.969 Å | (90) |
1.788 Å | (90) |
2.682 Å | (80) |
3.016 Å | (70) |
Comments:
Duranus, France. Data from the type description.
Geological EnvironmentHide
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Type Occurrence of DuranusiteHide
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General Appearance of Type Material:
Tiny grey black grains encased in realgar.
Place of Conservation of Type Material:
National School of Mines, Paris, France.
Geological Setting of Type Material:
Calcite veinlets in marls and siliceous limestones.
Associated Minerals at Type Locality:
Synonyms of DuranusiteHide
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Other Language Names for DuranusiteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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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 DuranusiteHide
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References for DuranusiteHide
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Reference List:
Johan, Zdenek, Laforêt, Claude, Picot, Paul, Feraud, Jean (1973) La duranusite, As4S, un nouveau minéral. Bulletin de Minéralogie, 96 (2) 131-134 doi:10.3406/bulmi.1973.6794
Banaru, D. A., Aksenov, S. M., Yamnova, N. A., Banaru, A. M. (2023) Structural Complexity of Molecular, Chain, and Layered Crystal Structures of Natural and Synthetic Arsenic Sulfides. Crystallography Reports, 68 (2). 223-236 doi:10.1134/s1063774523020037
Localities for DuranusiteHide
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This 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.
Locality ListHide
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- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.