Mineralogy Database

Iltisite Mineral Data

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General Iltisite Information

Help on Chemical  Formula: Chemical Formula: HgSAg(Cl,Br)
Help on Composition: Composition: Molecular Weight = 387.09 gm
   Silver    27.87 %  Ag
   Mercury   51.82 %  Hg
   Sulfur     8.28 %  S
   Bromine    5.16 %  Br
   Chlorine   6.87 %  Cl
            100.00 % 
Help on Empirical Formula: Empirical Formula: HgSAgCl0.75Br0.25
Help on Environment: Environment: In small cavities in conglomerate. A hexagonal polymorph of capgaronnite.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: The Cap Garonne mine, near Le Pradet, Var, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Antoine Iltis (1942-), who found the mineral.
Help on Name Pronunciation: Name Pronunciation: Iltisite Say ILTISITE
Help on Synonym: Synonym: IMA1994-031

Iltisite Image

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Comments: Reddish brown acicular iltisite crystals associated with baryte, cornwallite, strashmirite and quartz.
Location: Cap Garonne Mine, Pradet, Var, Provence-Alpes-Cote d'Azur, France. Scale: See Image.
© Rruff Database

Iltisite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.35365
Help on Cell Dimensions: Cell Dimensions: a = 8.234, c = 19.38, Z = 12; V = 1,137.91 Den(Calc)= 6.78
Help on Crystal System: Crystal System: Hexagonal - Trapezohedral H-M Symbol (6 2 2) Space Group: P 62,P 6222
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.879(1), 3.357(0.6), 3.127(0.5),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 0 1) ( 0 0 1)

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Physical Properties of Iltisite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Red, Brownish red.
Help on Density: Density: 6.59
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Fragile - Crystals with a delicate and easily injured structure.
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Luster: Luster: Adamantine
Help on Streak: Streak: red

Optical Properties of Iltisite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.133 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.101 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.177,KPDmeas= 0.1821,KC= 0.1608
Ncalc = 2.06 - 2.09
Help on Optical Data: Optical Data: Uniaxial (-), e=2.1, w=2.3, bire=0.2000.

Calculated Properties of Iltisite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.76 gm/cc
note: Specific Gravity of Iltisite =6.78 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PEIltisite = 943.53 barns/electron
U=PEIltisite x rElectron Density=5,437.14 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Iltisite is Not Radioactive

Iltisite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.15.06)Dana Group Capgaronnite HgAg(Cl,Br,I)S P 212121 2 2 2 Iltisite! HgSAg(Cl,Br) P 62,P 6222 6 2 2
Help on  Strunz Class: Strunz Class: 02.FC.20b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O
  02.FC -With Cl, Br, I (halide-sulfides)
02.FC.20b Iltisite! HgSAg(Cl,Br) P 62,P 6222 6 2 2

Other Iltisite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p401,1998) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Iltisite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 02.FC.20b





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