Lafossaite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Lafossaite
Formula:
Tl(Cl,Br)
Colour:
Grey-brown
Lustre:
Resinous, Greasy
Hardness:
3 - 4
Specific Gravity:
7.212 (Calculated)
Crystal System:
Isometric
Name:
After the type locality the La Fossa crater, Vulcano Island, Eolie Islands (Aeolian Islands), Lipari, Messina Province, Sicily, Italy.
Chemically the Cl analogue of nataliyamalikite (which, however, has a different crystal structure).
See also UM1998-03-Cl:Tl.
See also UM1998-03-Cl:Tl.
Unique Identifiers
Mindat ID:
27521
Long-form identifier:
mindat:1:1:27521:1
GUID
(UUID V4):
(UUID V4):
f759fccd-92c1-4fc0-8c60-ec05fc6c9a9a
IMA Classification of Lafossaite
Classification of Lafossaite
3.AA.25
3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
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 |
|---|---|---|
| Lfs | 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 Lafossaite
Resinous, Greasy
Transparency:
Translucent
Colour:
Grey-brown
Streak:
off white to cream
Hardness:
3 - 4 on Mohs scale
Hardness Data:
Estimated
Tenacity:
Malleable
Fracture:
Sub-Conchoidal
Density:
7.212 g/cm3 (Calculated)
Optical Data of Lafossaite
Type:
Isotropic
RI values:
n = 2.264
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Very High
Colour in reflected light:
Grey - white
Internal Reflections:
white
Pleochroism:
Non-pleochroic
Chemistry of Lafossaite
Mindat Formula:
Tl(Cl,Br)
Elements listed:
Crystallography of Lafossaite
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Pm3m
Cell Parameters:
a = 3.8756 Å
Unit Cell V:
58.212 ų
Z:
1
Morphology:
cubes to octahedra
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0018090 | Lafossaite | Moeller K (1933) Eine fur Praezisionsbestimmungen von Gitterkonstanten nach der Debye- Scherrer-Methode besonders geeignete Eichsubstanz _cod_database_code 1011364 Naturwissenschaften 21 223-223 | 1933 | 0 | 293 | ||
| 0018089 | Lafossaite | Roberts A C, Venance K E, Seward T M, Grice J D, Paar W H (2006) Lafossaite, a new mineral from the La Fossa Crater, Vulcano, Italy The Mineralogical Record 37 165-168 | 2006 | La Fossa Crater, Vulcano, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.887 Å | (80) |
| 2.745 Å | (100) |
| 2.237 Å | (55) |
| 1.937 Å | (50) |
| 1.733 Å | (45) |
| 1.583 Å | (70) |
Comments:
From type description.
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 Lafossaite
Place of Conservation of Type Material:
ETH Zurich
Geological Setting of Type Material:
Fumarole
Synonyms of Lafossaite
Other Language Names for Lafossaite
Common Associates
Associated Minerals Based on Photo Data:
| 4 photos of Lafossaite associated with Thalcusite | Tl2Cu3FeS4 |
| 3 photos of Lafossaite associated with Bismuthinite | Bi2S3 |
| 2 photos of Lafossaite associated with Realgar | As4S4 |
| 1 photo of Lafossaite associated with Raguinite | TlFeS2 |
| 1 photo of Lafossaite associated with Polylithionite | KLi2Al(Si4O10)(F,OH)2 |
| 1 photo of Lafossaite associated with Steropesite | Tl3BiCl6 |
| 1 photo of Lafossaite associated with Lorándite | TlAsS2 |
Related Minerals - Strunz-mindat Grouping
| 3.AA. | Brontesite | (NH4)3PbCl5 |
| 3.AA.05 | Marshite | CuI |
| 3.AA.05 | Miersite | (Ag,Cu)I |
| 3.AA.05 | Nantokite | CuCl |
| 3.AA.05 | UM1999-11:I:CuS | Cu(I,S) |
| 3.AA.10 | Iodargyrite | AgI |
| 3.AA.10 | Tocornalite | (Ag,Hg)I |
| 3.AA.15 | Bromargyrite | AgBr |
| 3.AA.15 | Chlorargyrite | AgCl |
| 3.AA.20 | Carobbiite | KF |
| 3.AA.20 | Griceite | LiF |
| 3.AA.20 | Halite | NaCl |
| 3.AA.20 | Sylvite | KCl |
| 3.AA.20 | Villiaumite | NaF |
| 3.AA.25 | Salammoniac | NH4Cl |
| 3.AA.25 | UM1998-03-Cl:Tl | TlCl |
| 3.AA.25 | Nataliyamalikite | TlI |
| 3.AA.30 | Calomel | [Hg2]2+Cl2 |
| 3.AA.30 | Kuzminite | [Hg2]2+(Br,Cl)2 |
| 3.AA.30 | Moschelite | [Hg2]2+I2 |
| 3.AA.35 | Neighborite | NaMgF3 |
| 3.AA.35 | Parascandolaite | KMgF3 |
| 3.AA.40 | Chlorocalcite | KCaCl3 |
| 3.AA.40 | Javorieite | KFeCl3 |
| 3.AA.45 | Kolarite | PbTeCl2 |
| 3.AA.50 | Radhakrishnaite | PbTe3(Cl,S)2 |
| 3.AA.55 | Challacolloite | KPb2Cl5 |
| 3.AA.60 | Hephaistosite | TlPb2Cl5 |
| 3.AA.90 | Pseudocotunnite | K2PbCl4 |
Other Information
Health Risks:
extremely toxic
Internet Links for Lafossaite
mindat.org URL:
https://www.mindat.org/min-27521.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Lafossaite
Localities for Lafossaite
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.
China | |
| Fan et al. (2014) +1 other reference |
Greenland | |
| Pavel M. Kartashov analytical data (2007) |
Italy | |
| Campostrini et al. (2012) |
| Campostrini et al. (2012) | |
| Roberts et al. (2006) |
North Macedonia | |
| EDS analyzed by Joy Desor. +1 other reference |
Poland | |
| Ł. Kruszewski EDS data |
Switzerland | |
| Raber et al. (2023) |
Quick NavTopAbout LafossaiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Vulcano Island, Lipari, Eolie Islands, Metropolitan City of Messina, Sicily, Italy