Steropesite
A valid IMA mineral species
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About Steropesite
Cyclops
Formula:
Tl3BiCl6
Colour:
Pale yellow, pale lemon-yellow
Lustre:
Adamantine, Sub-Adamantine, Vitreous
Specific Gravity:
5.737 (Calculated)
Crystal System:
Monoclinic
Name:
Named in 2009 by Francesco DeMartin, Carlo Maria Gramaccioli, and Italo Campostrini after Steropes (Στεροπης), the son of Uranus in allusion to the mineral's occurrence on the Island of Vulcano where the mythical Steropes ("lightning") labored. These mythological half-gods were helpers of Hephaistos (Hephaestus), the ancient Greek god of fire, whose workshops were alleged to be located at Vulcano.
This page provides mineralogical data about Steropesite.
Unique Identifiers
Mindat ID:
38692
Long-form identifier:
mindat:1:1:38692:4
IMA Classification of Steropesite
Approved
IMA Formula:
Tl1+3Bi3+Cl6
Approval year:
2008
First published:
2009
Classification of Steropesite
3.CK.05
3 : HALIDES
C : Complex halides
K : Halides of Bi, etc.
3 : HALIDES
C : Complex halides
K : Halides of Bi, etc.
11.5.9.
11 : HALIDE COMPLEXES
5 : AmBX6
11 : HALIDE COMPLEXES
5 : AmBX6
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 |
|---|---|---|
| Strp | 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 Steropesite
Adamantine, Sub-Adamantine, Vitreous
Transparency:
Transparent
Colour:
Pale yellow, pale lemon-yellow
Streak:
White
Tenacity:
Brittle
Cleavage:
None Observed
Density:
5.737 g/cm3 (Calculated)
Optical Data of Steropesite
Type:
Biaxial
Pleochroism:
Non-pleochroic
Comments:
Calculated RI = 1.922
Chemistry of Steropesite
Mindat Formula:
Tl3BiCl6
Element Weights:
Elements listed:
Crystallography of Steropesite
Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bb
Setting:
Cc
Cell Parameters:
a = 26.686 Å, b = 15.127 Å, c = 13.014 Å
β = 108.11°
β = 108.11°
Ratio:
a:b:c = 1.764 : 1 : 0.86
Unit Cell V:
4,993.23 ų (Calculated from Unit Cell)
Z:
16
Morphology:
Platy crystals with dominant {100} and small {010}, {001}, {121}, and {121}.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0006287 | Steropesite | Demartin F, Gramaccioli C M, Campostrini I (2009) Steropesite, Tl3BiCl6, a new thallium bismuth chloride from La Fossa crater, Vulcano, Aeolian Islands, Italy The Canadian Mineralogist 47 373-380 |  | 2009 | 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 |
|---|---|
| 4.241 Å | (29) |
| 3.884 Å | (30) |
| 3.846 Å | (40) |
| 3.773 Å | (100) |
| 2.801 Å | (27) |
| 2.745 Å | (30) |
| 2.710 Å | (35) |
| 2.113 Å | (93) |
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 Steropesite
General Appearance of Type Material:
Pale lemon-yellow platy (stout and tabular) crystals to 0.2 mm
Place of Conservation of Type Material:
The holotype is deposited (no. 2008–02) in the Reference Collection of Dipartimento di Chimica Strutturale e Stereochimica Inorganica of Università degli Studi di Milano.
Geological Setting of Type Material:
From a high-temperature fumarole [450 C] near a crater of an active volcano.
Associated Minerals at Type Locality:
Synonyms of Steropesite
Other Language Names for Steropesite
Dutch:Steropesiet
German:Steropesit
Common Associates
Associations Based on Photo Data:
| 6 photos of Steropesite associated with Lafossaite | Tl(Cl,Br) |
| 2 photos of Steropesite associated with Challacolloite | KPb2Cl5 |
| 2 photos of Steropesite associated with Aiolosite | Na4Bi(SO4)3Cl |
| 1 photo of Steropesite associated with Aragonite | CaCO3 |
| 1 photo of Steropesite associated with Pseudocotunnite | K2PbCl4 |
| 1 photo of Steropesite associated with Galenobismutite | PbBi2S4 |
| 1 photo of Steropesite associated with Native Sulphur | S8 |
| 1 photo of Steropesite associated with Sassolite | H3BO3 |
| 1 photo of Steropesite associated with Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| 1 photo of Steropesite associated with Salammoniac | NH4Cl |
Fluorescence of Steropesite
Not fluorescent in UV.
Other Information
Notes:
The mineral is not hygroscopic and seems stable in the 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 Steropesite
mindat.org URL:
https://www.mindat.org/min-38692.html
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References for Steropesite
Localities for Steropesite
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) | |
| Demartin et al. (2009) |
Quick NavTopAbout SteropesiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesFluorescence Other InformationInternet Links References Localities Locality List
La Fossa crater, Vulcano Island, Lipari, Eolie Islands, Metropolitan City of Messina, Sicily, Italy