Iltisite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Iltisite
Tony Iltis
Formula:
HgAgSCl
Cl may be replaced by minor Br.
Colour:
Red to red-brown
Lustre:
Adamantine
Specific Gravity:
6.59 (Calculated)
Crystal System:
Hexagonal
Name:
Named in honor of M. Antoine Iltis (1942 - May 20, 2022), an amateur mineral collector who first found the mineral.
Dimorph of:
This page provides mineralogical data about Iltisite.
Unique Identifiers
Mindat ID:
7008
Long-form identifier:
mindat:1:1:7008:5
Similar Names
| Altisite | A valid IMA mineral species | Na3K6Ti2Al2Si8O26Cl3 |
IMA Classification of Iltisite
Approved
IMA Formula:
Hg2+Ag1+S2-Cl
Approval year:
1994
First published:
1997
Classification of Iltisite
2.FC.20b
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
C : With Cl, Br, I (halide-sulfides)
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
C : With Cl, Br, I (halide-sulfides)
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 |
|---|---|---|
| Iti | 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 Iltisite
Adamantine
Transparency:
Translucent
Colour:
Red to red-brown
Streak:
Red
Hardness Data:
Could not be measured
Tenacity:
Brittle
Cleavage:
Perfect
{001}
{001}
Fracture:
Irregular/Uneven
Density:
6.59(1) g/cm3 (Calculated)
Comment:
Could not be measured due to small crystal size.
Optical Data of Iltisite
Type:
Uniaxial (-)
RI values:
nω = 2.3 nε = 2.1
Max. Birefringence:
δ = 0.200
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Pleochroism:
Visible
Comments:
O = red, E = brownish red.
Chemistry of Iltisite
Mindat Formula:
HgAgSCl
Cl may be replaced by minor Br.
Cl may be replaced by minor Br.
Element Weights:
Elements listed:
Crystallography of Iltisite
Crystal System:
Hexagonal
Cell Parameters:
a = 8.234(4) Å, c = 19.38(1) Å
Ratio:
a:c = 1 : 2.354
Unit Cell V:
1,137.91 ų (Calculated from Unit Cell)
Z:
12
Morphology:
Hexagonal crystals, flattened on {001} and showing {001} and {101}.
Comment:
Space group P62, P64, P6222 or P6422.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.124 Å | (30) |
| 3.357 Å | (60) |
| 3.237 Å | (30) |
| 3.127 Å | (50) |
| 2.879 Å | (100) |
| 2.009 Å | (50) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Iltisite
General Appearance of Type Material:
Isolated, hexagonal crystals to 0.02 mm in diameter.
Place of Conservation of Type Material:
Department of Mineralogy of the Muséum d’histoire naturelle de Genève, Switzerland.
Associated Minerals at Type Locality:
Synonyms of Iltisite
Other Language Names for Iltisite
Common Associates
Associations Based on Photo Data:
| 13 photos of Iltisite associated with Perroudite | Hg5Ag4S5(I,Br)2Cl2 |
| 11 photos of Iltisite associated with Capgaronnite | AgHgClS |
| 6 photos of Iltisite associated with Parnauite | Cu9(AsO4)2(SO4)(OH)10 · 7H2O |
| 5 photos of Iltisite associated with Corderoite | Hg2+3S2Cl2 |
| 3 photos of Iltisite associated with Olivenite | Cu2(AsO4)(OH) |
| 1 photo of Iltisite associated with Pharmacosiderite | KFe3+4(AsO4)3(OH)4 · 6-7H2O |
| 1 photo of Iltisite associated with Dickite | Al2(Si2O5)(OH)4 |
| 1 photo of Iltisite associated with Cornwallite | Cu5(AsO4)2(OH)4 |
Related Minerals - Strunz-mindat Grouping
| 2.FC. | Demicheleite-(I) | BiSI |
| 2.FC.05 | Djerfisherite | K6(Fe,Cu,Ni)25S26Cl |
| 2.FC.05 | Owensite | (Ba,Pb)6(Cu,Fe,Ni)25S27 |
| 2.FC.05 | Thalfenisite | Tl6(Fe,Ni,Cu)25S26Cl |
| 2.FC.05 | Gmalimite | K6◻Fe2+24S27 |
| 2.FC.05 | 'Cu-djerfisherite' | K6(Cu,Fe)25S26Cl |
| 2.FC.05 | Zoharite | (Ba,K)6(Fe,Cu,Ni)25S27 |
| 2.FC.10 | Bartonite | K6Fe20S26S |
| 2.FC.10 | Chlorbartonite | K6Fe24S26(Cl,S) |
| 2.FC.15d | Radtkeite | Hg2+3S2ICl |
| 2.FC.15a | Lavrentievite | Hg3S2Cl2 |
| 2.FC.15a | Corderoite | Hg2+3S2Cl2 |
| 2.FC.15a | 'Arzakite' | Hg2+3S2(Br,Cl)2 |
| 2.FC.15c | Grechishchevite | Hg2+3S2(Br,Cl,I)2 |
| 2.FC.15b | Kenhsuite | Hg2+3S2Cl2 |
| 2.FC.20c | Perroudite | Hg5Ag4S5(I,Br)2Cl2 |
| 2.FC.20a | Capgaronnite | AgHgClS |
| 2.FC.20d | Hanauerite | AgHgSI |
| 2.FC.25 | Demicheleite-(Cl) | BiSCl |
| 2.FC.25 | Demicheleite-(Br) | BiSBr |
Fluorescence of Iltisite
Not fluorescent.
Other Information
Notes:
Insoluble in HCl.
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 Iltisite
mindat.org URL:
https://www.mindat.org/min-7008.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 Iltisite
Reference List:
Sarp, H., Sanz-Gysler, J., Perroud, P. (1997) L'iltisite, HgSAg(Cl,Br), un nouveau minéral de la mine de Cap Garonne, Var (France), polymorphe de la capgaronnite. Archives des Sciences, Genève, 50 (1) 1-5
Localities for Iltisite
Showing 4 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.
France (TL) | |
| Sarp et al. (1997) +2 other references |
| Favreau (n.d.) | |
Hungary | |
| Szakáll: Minerals of Rudabánya |
Spain | |
| C. MENOR-SALVÁN (2012) |
Quick NavTopAbout IltisiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Cap Garonne Mine, Le Pradet, Toulon, Var, Provence-Alpes-Côte d'Azur, France