Iltisite Mineral Data

General Iltisite Information

Chemical Formula:

HgSAg(Cl,Br)

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 %

Empirical Formula:

HgSAgCl_0.75Br_0.25

Environment:

In small cavities in conglomerate. A hexagonal polymorph of capgaronnite.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

The Cap Garonne mine, near Le Pradet, Var, France. Link to MinDat.org Location Data.

Name Origin:

For Antoine Iltis (1942-), who found the mineral.

Name Pronunciation:

Iltisite

Synonym:

IMA1994-031

Iltisite Image

Images:

Iltisite

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

Axial Ratios:

a:c = 1:2.35365

Cell Dimensions:

a = 8.234, c = 19.38, Z = 12; V = 1,137.91 Den(Calc)= 6.78

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/I_o): 2.879(1), 3.357(0.6), 3.127(0.5),

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

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Physical Properties of Iltisite

Cleavage:

{001} Perfect

Color:

Red, Brownish red.

Density:

6.59

Diaphaneity:

Translucent

Fracture:

Fragile - Crystals with a delicate and easily injured structure.

Habit:

Disseminated - Occurs in small, distinct particles dispersed in matrix.

Habit:

Platy - Sheet forms (e.g. micas).

Luster:

Adamantine

Streak:

red

Optical Properties of Iltisite

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

Optical Data:

Uniaxial (-), e=2.1, w=2.3, bire=0.2000.

Calculated Properties of Iltisite

Electron Density:

Bulk Density (Electron Density)=5.76 gm/cc
note: Specific Gravity of Iltisite =6.78 gm/cc.

Fermion Index:

Fermion Index = 0.15
Boson Index = 0.85

Photoelectric:

PE_Iltisite= 943.53 barns/electron
U=PE_Iltisite x rElectron Density=5,437.14 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Iltisite is Not Radioactive

Iltisite Classification

Dana Class:

02.15.06.02 (02)Sulfides - Including Selenides and Tellurides

(02.15)(Chlorides)

(02.15.06)Dana Group

02.15.06.01 Capgaronnite HgAg(Cl,Br,I)S P 2₁2₁2₁ 2 2 2

02.15.06.02 Iltisite! HgSAg(Cl,Br) P 6₂,P 6₂22 6 2 2

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

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p401,1998) OPTIC PROP.(MinRec)

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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Print or Cut-and-Paste your Iltisite Specimen Label here :

Iltisite

HgSAg(Cl,Br)
Dana No: 02.15.06.02 Strunz No: 02.FC.20b
Locality:

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