Mineralogy Database

Coccinite Mineral Data

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General Coccinite Information

Help on Chemical  Formula: Chemical Formula: Hg++I2 (?)
Help on Composition: Composition: Molecular Weight = 454.40 gm
   Mercury  44.14 %  Hg   47.67 % HgO
   Iodine   55.86 %  I    55.86 % I
              -   %   I    -3.52 % -O=I2    
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: HgI2
Help on Environment: Environment: An inadequately described species. The Casa Viejas material is now considered to be an oxychloride of mercury.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1845 (Dana # Added)
Help on Locality: Locality: Casa Viejas, Mexico. Terlingua District, Del Rio, Texas, USA.. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Unknown.

Coccinite Image

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  Coccinite   Sulfur

Comments: Orange-red coccinite on sulfur. Due to the volatility of the mineral at room temperature, the sample is preserved in a closed vial. The photo was made through the vial, therefore the sharpness is reduced.
Location: Lichtenberg Mine, Ronneburg U Deposit, Gera district, Thuringia, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Coccinite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.83592
Help on Cell Dimensions: Cell Dimensions: a = 4.376, c = 12.41, Z = 1; V = 237.64 Den(Calc)= 3.17
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 41/nmc

Physical Properties of Coccinite

Help on Color: Color: Orange red, Reddish brown.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Hardness: Hardness: 2 - Gypsum
Help on Streak: Streak: orange

Optical Properties of Coccinite

Help on Optical Data: Optical Data: NCalc= 1.59 - from Gladstone-Dale relationship (KC = 0.1854) where Ncalc=Dcalc*KC+1

Calculated Properties of Coccinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Coccinite =3.17 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.13
Boson Index = 0.87
Help on Photoelectric: Photoelectric: PECoccinite = 992.89 barns/electron
U=PECoccinite x rElectron Density=2,576.70 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coccinite is Not Radioactive

Coccinite Classification

Help on  Dana Class: Dana Class: (09)Anhydrous and Hydrated Halides
  (09.02)where A (X)2
  (09.02.07)Cotunnite Group Cotunnite PbCl2 Pnam 2/m 2/m 2/m Hydrophilite? CaCl2 Pnnm 2/m 2/m 2/m Coccinite! HgI2(?) P 41/nmc 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 03.AB.10 03 - HALIDES
  03.A - Simple Halides, Without H2O
  03.AB -M:X = 1:2
03.AB.10 Coccinite HgI2(?) P 41/nmc 4/m 2/m 2/m

Other Coccinite Information

Help on References: References: NAME( Dana7) PHYS. PROP.(Enc. of Minerals,1st ed.,1974)
Help on See Also: See Also: Links to other databases for Coccinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Hg++I2 (?)
Dana No: Strunz No: 03.AB.10





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