Allargentum (original) (raw)
A valid IMA mineral species - grandfathered
About AllargentumHide
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(x ≈ 0.09-0.16). Sometimes simplified as Ag6Sb.
Name:
From the Greek άλλος ("allos") for "another" and Latin argentum, "silver".
This page provides mineralogical data about Allargentum.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:128:1
3e1e2750-6606-47ec-8e75-a416c4ebba2e
IMA Classification of AllargentumHide
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Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ag1-xSbx (x ≈ 0.09-0.16)
Type description reference:
Petruk, W., Cabri, L.J., Harris, D.C., Stewart, J.M., Clark, L.A. (1970) Allargentum, redefined. The Canadian Mineralogist, 10 (2) 163-172
Classification of AllargentumHide
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2.AA.30
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
A : Alloys of metalloids with Cu, Ag, Au
2.2.1.2
2 : SULFIDES
2 : AmBnXp, with (m+n):p = 3:1
1.46
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.
| Symbol | Source | Reference |
|---|---|---|
| All | 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 AllargentumHide
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Hardness:
VHN100=172 - 203 - Vickers
Density:
10.0 g/cm3 (Measured) 10.12 g/cm3 (Calculated)
Comment:
On synthetic material
Optical Data of AllargentumHide
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Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 67.0% | 68.8% |
| 420nm | 66.5% | 68.2% |
| 440nm | 66.0% | 67.6% |
| 460nm | 65.9% | 67.3% |
| 480nm | 67.1% | 68.6% |
| 500nm | 67.4% | 68.7% |
| 520nm | 68.9% | 70.4% |
| 540nm | 69.5% | 70.9% |
| 560nm | 70.2% | 71.6% |
| 580nm | 70.5% | 71.8% |
| 600nm | 71.0% | 72.3% |
| 620nm | 71.7% | 73.0% |
| 640nm | 72.1% | 73.4% |
| 660nm | 72.6% | 73.9% |
| 680nm | 73.1% | 74.3% |
| 700nm | 73.8% | 74.9% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 74.9%.
R1 shown in black, R2 shown in red
Chemistry of AllargentumHide
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Mindat Formula:
(Ag1-xSbx)
(x ≈ 0.09-0.16). Sometimes simplified as Ag6Sb.
Common Impurities:
Hg,Ni,As
Crystallography of AllargentumHide
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Cell Parameters:
a = 2.952 Å, c = 4.773 Å
Unit Cell V:
36.02 ų (Calculated from Unit Cell)
Morphology:
In complex intergrowths with silver, and as very small grains.
Comment:
Crystal class = nd; Point group = nd
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005089 | Allargentum | Petruk W, Cabri L J, Harris D C, Stewart J M, Clark L A (1970) Allargentum, redefined The Canadian Mineralogist 10 163-172 |  |
1970 | Hi-Ho mine, Cobalt, Ontario, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.545 Å | (70) |
| 2.396 Å | (70) |
| 2.245 Å | (100) |
| 1.744 Å | (40) |
| 1.469 Å | (40) |
| 1.352 Å | (60) |
| 1.252 Å | (50) |
| 1.228 Å | (40) |
| 1.082 Å | (40) |
| 0.995 Å | (40) |
Comments:
Synthetic (ICDD 25-54).
Geological EnvironmentHide
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Geological Setting:
Silver-antimony ores (Ni-Co-Ag deposits); In high-grade Ag–Sb ores
Type Occurrence of AllargentumHide
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General Appearance of Type Material:
In complex intergrowths with silver, and as very small grains.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, 61343–61345, 61519; The Natural History Museum, London, England; National Museum of Natural History, Washington, D.C., USA, 135409.
Geological Setting of Type Material:
5 element Silver-Nickel-Cobalt-Bismuth-Uranium veins
Associated Minerals at Type Locality:
Reference:
Petruk W, Cabri L J, Harris D C, Stewart J M, Clark L A (1970) Allargentum, redefined. The Canadian Mineralogist 10, 163-172
Other Language Names for AllargentumHide
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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 AllargentumHide
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References for AllargentumHide
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Reference List:
Petruk, W., Cabri, L.J., Harris, D.C., Stewart, J.M., Clark, L.A. (1970) Allargentum, redefined. The Canadian Mineralogist, 10 (2) 163-172
Localities for AllargentumHide
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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.