Coccinite Mineral Data

Coccinite Mineral Data

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

IMA Status:

Not Approved IMA

Locality:

Link to MinDat.org Location Data.

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.

Diaphaniety:

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:

r_electron=2.60 gm/cc
note: r_Coccinite=3.17 gm/cc.

Fermion Index

Fermion Index = 0.13331
Boson Index = 0.86669

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Coccinite is Not Radioactive

Coccinite Classification

Dana Class:

9.0.0.0 (9)Halide Minerals

(9.0)Without Dana Classification Numbers

(Iodide)

Strunz Class:

III/A.08-60 III - Halogenides

III/A - Simple Halogenides, without water Metal : Halogen = 1 : 2, 1 : 3

III/A.08 - Fluorite series and related compounds

III/A.08-10 Fluorite CaF2 F m3m 4/m 3 2/m

III/A.08-20 Frankdicksonite BaF2 F m3m 4/m 3 2/m

III/A.08-25 Haleniusite-(La)! (La,Ce)OF F m3m 4/m 3 2/m

III/A.08-30 Tveitite-(Y) Ca1-xYxF2x,x~0.3 Unk Mono

III/A.08-40 Gagarinite-(Y) NaCaY(F,Cl)6 P 3 3

III/A.08-45 Zajacite-(Ce) Na(REExCa1-x)(REEyCa1-y)F6where(xney) P 3 3

III/A.08-50 Laurelite Pb7F12Cl2 P 6 6

III/A.08-60 Coccinite HgI2(?) P 4₁/nmc 4/m 2/m 2/m

Other Coccinite Information

References:

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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Coccinite

Hg++I2 (?)
Dana No: Unknown Strunz No: III/A.08-60
Locality:

Notes: