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Coccinite Mineral Data
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General Coccinite Information
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 Chemical Formula: |
Hg++I2 (?) |
| Composition: |
Molecular Weight = 454.40 gm |
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Mercury 44.14 % Hg 47.67 % HgO |
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Iodine 55.86 % I 55.86 % I |
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- %
I -3.52 % -O=I2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
HgI2 |
| Environment: |
An inadequately described species. The Casa Viejas material is now considered to be an oxychloride of mercury. |
| IMA Status: |
Valid Species (Pre-IMA) 1845 (Dana # Added) |
| Locality: |
Casa Viejas, Mexico. Terlingua District, Del Rio, Texas, USA.. Link to MinDat.org Location Data. |
| Name Origin: |
Unknown. |
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Coccinite Image |
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Images:
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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 |
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Coccinite Crystallography
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| Axial Ratios: |
a:c = 1:2.83592 |
| Cell Dimensions: |
a = 4.376, c = 12.41, Z = 1; V = 237.64 Den(Calc)= 3.17 |
| Crystal System: |
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 41/nmc |
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Physical Properties of Coccinite
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| Color: |
Orange red, Reddish brown. |
| Diaphaneity: |
Translucent |
| Hardness: |
2 - Gypsum |
| Streak: |
orange |
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Optical Properties of Coccinite
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| Optical Data: |
NCalc= 1.59 - from Gladstone-Dale relationship (KC = 0.1854) where Ncalc=Dcalc*KC+1
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Calculated Properties of Coccinite
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| Electron Density: |
Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Coccinite =3.17 gm/cc.
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| Fermion Index: |
Fermion Index = 0.13
Boson Index = 0.87 |
| Photoelectric: |
PECoccinite = 992.89 barns/electron
U=PECoccinite x rElectron Density=2,576.70 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coccinite is Not Radioactive |
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Coccinite Classification
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| Dana Class: |
09.02.07.03 (09)Anhydrous and Hydrated Halides |
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(09.02)where A (X)2 |
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(09.02.07)Cotunnite Group |
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09.02.07.01 Cotunnite PbCl2 Pnam 2/m 2/m 2/m |
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09.02.07.02 Hydrophilite? CaCl2 Pnnm 2/m 2/m 2/m |
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09.02.07.03 Coccinite! HgI2(?) P 41/nmc 4/m 2/m 2/m |
| Strunz Class: |
03.AB.10 03 - HALIDES |
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03.A - Simple Halides, Without H2O |
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03.AB -M:X = 1:2 |
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03.AB.10 Coccinite HgI2(?) P 41/nmc 4/m 2/m 2/m |
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Other Coccinite Information
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| References: |
NAME( Dana7) PHYS. PROP.(Enc. of Minerals,1st ed.,1974) |
| 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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Coccinite
Hg++I2 (?)
Dana No: 09.02.07.03 Strunz No: 03.AB.10
Locality:
Notes:
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