Algodonite (original) (raw)
A valid IMA mineral species - grandfathered
About AlgodoniteHide
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Colour:
Steel-gray to silver-white, tarnishes dull on exposure
Name:
Named after its discovery locality in Chile.
This page provides mineralogical data about Algodonite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:114:8
0ee260f1-f646-4a57-b6c8-3fddeaf88750
IMA Classification of AlgodoniteHide
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Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Cu1-xAsx (x ≈ 0.15)
Classification of AlgodoniteHide
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2.AA.10a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
A : Alloys of metalloids with Cu, Ag, Au
2.1.1.1
2 : SULFIDES
1 : AmXp, with m:p > 3:1
1.38
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
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 |
|---|---|---|
| Ago | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Alg | 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 AlgodoniteHide
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Colour:
Steel-gray to silver-white, tarnishes dull on exposure
Comment:
In polished section, bright cream-white
Hardness:
VHN100=245 - 302 kg/mm2 - Vickers
Density:
8.38 g/cm3 (Measured) 8.72 g/cm3 (Calculated)
Optical Data of AlgodoniteHide
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Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 51.5% | 49.3% |
| 420nm | 52.3% | 50.5% |
| 440nm | 52.8% | 52.4% |
| 460nm | 53.4% | 54.6% |
| 480nm | 54.2% | 56.4% |
| 500nm | 55.7% | 58.4% |
| 520nm | 57.5% | 60.5% |
| 540nm | 58.9% | 62.3% |
| 560nm | 60.0% | 63.8% |
| 580nm | 60.8% | 64.8% |
| 600nm | 61.1% | 65.5% |
| 620nm | 61.6% | 66.1% |
| 640nm | 61.9% | 66.5% |
| 660nm | 62.3% | 66.7% |
| 680nm | 62.8% | 66.9% |
| 700nm | 63.4% | 67.1% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 67.1%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Bright cream-white
Chemistry of AlgodoniteHide
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Crystallography of AlgodoniteHide
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Class (H-M):
6/m m m _(_6/_m_2/_m_2/m ) - Dihexagonal Dipyramidal
Cell Parameters:
a = 2.600 Å, c = 4.228 Å
Unit Cell V:
24.75 ų (Calculated from Unit Cell)
Morphology:
As incrustations of minute highly distorted crystals; commonly massive and granular.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018469 | Algodonite | Heyding R D, Despault G J G (1960) The copper/arsenic system and the copper arsenide minerals Canadian Journal of Chemistry 38 2477-2481 | 1960 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.25 Å | (20) |
| 2.11 Å | (40) |
| 1.989 Å | (100) |
| 1.299 Å | (20) |
| 1.194 Å | (20) |
| 1.110 Å | (20) |
| 0.837 Å | (20) |
| 0.823 Å | (20) |
Comments:
Mohawk mine, Keweenaw Co., Michigan, USA (ICDD 9-429).
Geological EnvironmentHide
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Geological Setting:
Uncommon in hydrothermal deposits, intimately associated with other copper arsenides.
Type Occurrence of AlgodoniteHide
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Synonyms of AlgodoniteHide
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Other Language Names for AlgodoniteHide
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Varieties of AlgodoniteHide
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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 AlgodoniteHide
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References for AlgodoniteHide
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Reference List:
Localities for AlgodoniteHide
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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.