Coccinite Mineral Data

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General Coccinite Information

Chemical Formula:

Hg++I2 (?)

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

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.

Coccinite Image

Images:

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

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 DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4₁/nmc

Physical Properties of Coccinite

Color:

Orange red, Reddish brown.

Diaphaneity:

Translucent

Hardness:

2 - Gypsum

Streak:

orange

Optical Properties of Coccinite

Optical Data:

NCalc= 1.59 - from Gladstone-Dale relationship (KC = 0.1854) where Ncalc=Dcalc*KC+1

Calculated Properties of Coccinite

Electron Density:

Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Coccinite =3.17 gm/cc.

Fermion Index:

Fermion Index = 0.13
Boson Index = 0.87

Photoelectric:

PE_Coccinite= 992.89 barns/electron
U=PE_Coccinite x rElectron Density=2,576.70 barns/cc.

Radioactivity:

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

Coccinite Classification

Dana Class:

09.02.07.03 (09)Anhydrous and Hydrated Halides

(09.02)where A (X)2

(09.02.07)Cotunnite Group

09.02.07.01 Cotunnite PbCl2 Pnam 2/m 2/m 2/m

09.02.07.02 Hydrophilite? CaCl2 Pnnm 2/m 2/m 2/m

09.02.07.03 Coccinite! HgI2(?) P 4₁/nmc 4/m 2/m 2/m

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

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 - Google Images
6 - Google Scholar
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
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: