Argesite
A valid IMA mineral species
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About Argesite
Brontes, Arges, and Steropes
Formula:
(NH4)7Bi3Cl16
Colour:
Pale yellow
Lustre:
Vitreous
Specific Gravity:
2.88
Crystal System:
Trigonal
Name:
After Uranus’s son Arges, one of the three Cyclops who were helpers of Hephaistos, the ancient Greek god of fire (Vulcanus for the ancient Romans) whose workshops were alleged to be located at Vulcano island (or Etna).
Unique Identifiers
Mindat ID:
42369
Long-form identifier:
mindat:1:1:42369:6
IMA Classification of Argesite
Classification of Argesite
7.CD.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations
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 |
|---|---|---|
| Age | 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 Argesite
Vitreous
Colour:
Pale yellow
Streak:
White
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
2.88(1) g/cm3 (Measured) 2.843 g/cm3 (Calculated)
Optical Data of Argesite
Type:
Uniaxial (-)
RI values:
nω = 1.731(2) nε = 1.725(2)
Max. Birefringence:
δ = 0.006
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Chemistry of Argesite
Mindat Formula:
(NH4)7Bi3Cl16
Element Weights:
Elements listed:
Crystallography of Argesite
Crystal System:
Trigonal
Class (H-M):
3m(32/m) - Hexagonal Scalenohedral
Space Group:
R3c
Setting:
R3c
Cell Parameters:
a = 13.093(1) Å, c = 102.682(9) Å
Ratio:
a:c = 1 : 7.843
Unit Cell V:
15245 ų
Z:
18
Morphology:
Habit is almost tabular [according to the {001} pinacoid] and in most cases is very complex, due to the presence of various rhombohedra and bipyramids.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0019257 | Argesite | Demartin F, Campostrini I, Castellano C, Gramaccioli C M (2012) Argesite, (NH4)7Bi3Cl16, a new mineral from La Fossa Crater, Vulcano, Aeolian Islands, Italy: A first example of the [Bi2Cl10]4- anion American Mineralogist 97 1446-1451 | 2012 | La Fossa Crater, Vulcano, Aeolian Islands, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.46 Å | (11) |
| 6.14 Å | (16) |
| 5.71 Å | (11) |
| 3.808 Å | (44) |
| 3.164 Å | (100) |
| 2.742 Å | (24) |
| 1.906 Å | (16) |
| 1.686 Å | (13) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Argesite
General Appearance of Type Material:
Pale-yellow crystals up to 0.15 mm in length.
Place of Conservation of Type Material:
Type material is deposited in the Reference Collection of the DCSSI, University of Milan, Milan, Italy, sample number 2011-04.
Geological Setting of Type Material:
In an active medium-temperature (~250 °C) intracrater fumarole on a pyroclastic breccia.
Associated Minerals at Type Locality:
Synonyms of Argesite
Other Language Names for Argesite
Common Associates
Associations Based on Photo Data:
| 1 photo of Argesite associated with Adranosite | (NH4)4NaAl2(SO4)4Cl(OH)2 |
Related Minerals - Strunz-mindat Grouping
| 7.CD. | Campostriniite | (Bi3+,Na)3(NH4,K)2Na2(SO4)6 · H2O |
| 7.CD.05 | Matteuccite | NaHSO4 · H2O |
| 7.CD.10 | Mirabilite | Na2SO4 · 10H2O |
| 7.CD.15 | Lecontite | (NH4)Na(SO4) · 2H2O |
| 7.CD.20 | Hydroglauberite | Na10Ca3(SO4)8 · 6H2O |
| 7.CD.25 | Eugsterite | Na4Ca(SO4)3 · 2H2O |
| 7.CD.30 | Görgeyite | K2Ca5(SO4)6 · H2O |
| 7.CD.35 | Syngenite | K2Ca(SO4)2 · H2O |
| 7.CD.35 | Antofagastaite | Na2Ca(SO4)2 · 1.5H2O |
| 7.CD.35 | Koktaite | (NH4)2Ca(SO4)2 · H2O |
| 7.CD.40 | Gypsum | CaSO4 · 2H2O |
| 7.CD.45 | Chinleite-(Y) | NaY(SO4)2 · H2O |
| 7.CD.45 | Bassanite | Ca(SO4) · 0.5H2O |
| 7.CD.45 | Chinleite-(Nd) | NaNd(SO4)2 · H2O |
| 7.CD.45 | Chinleite-(Ce) | NaCe(SO4)2(H2O) |
| 7.CD.50 | Zircosulfate | (Zr,Ti)(SO4)2 · 4H2O |
| 7.CD.55 | Schieffelinite | Pb10Te6+6O20(OH)14(SO4)(H2O)5 |
| 7.CD.60 | Montanite | Bi2(TeO6) · nH2O |
| 7.CD.65 | Omongwaite | Na2Ca5(SO4)6 · 3H2O |
Fluorescence of Argesite
Non-fluorescent.
Other Information
Notes:
The mineral is not hygroscopic and is stable in open air.
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 Argesite
mindat.org URL:
https://www.mindat.org/min-42369.html
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References for Argesite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2011. CNMNC Newsletter No 11. Mineralogical Magazine, 75 (6) 2887-2893 doi:10.1180/minmag.2011.075.6.2887
Localities for Argesite
Showing 1 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.
Italy (TL) | |
| Williams et al. (2011) +1 other reference |
Quick NavTopAbout ArgesiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
La Fossa crater, Vulcano Island, Lipari, Eolie Islands, Metropolitan City of Messina, Sicily, Italy