Iranite Mineral Data

General Iranite Information

Chemical Formula:

Pb10Cu(CrO4)6(SiO4)2(F,OH)2

Composition:

Molecular Weight = 3,052.68 gm

Chromium 10.22 % Cr 19.65 % CrO₃

Copper 2.08 % Cu 2.34 % Cu₂O

Silicon 1.84 % Si 3.94 % SiO₂

Hydrogen 0.02 % H 0.15 % H₂O

Lead 67.87 % Pb 73.12 % PbO

Oxygen 17.03 % O

Fluorine 0.93 % F 0.93 % F

- % F -0.39 % -O=F₂

______ ______

100.00 % 99.74 % = TOTAL OXIDE

Empirical Formula:

Pb₁₀Cu(CrO₄)₆(SiO₄)₂F_1.5(OH)_0.5

IMA Status:

Approved IMA 1963

Locality:

Sebarz mine, NE of Anarak, Iran. Link to MinDat.org Location Data.

Name Origin:

Name for the country.

Name Pronunciation:

Iranite

Iranite Image

Images:

Iranite

Comments: Crystals of iranite to 3mm on brecciated, siliceous matrix.
Location: Sebarz mine, Anarak, Iran. Scale: 3.7 x 2.5 cm.
© John Veevaert

Iranite Crystallography

Axial Ratios:

a:b:c =1.0503:1:1.0366

Cell Dimensions:

a = 10.02, b = 9.54, c = 9.89, Z = 1; alpha = 104.5°, beta = 66°, gamma = 108.5° V = 792.94 Den(Calc)= 6.39

Crystal System:

Triclinic - Pedial H-M Symbol (1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.28(1), 3.49(1), 3.6(1),

Physical Properties of Iranite

Color:

Brownish yellow, Yellow, Honey brown.

Density:

5.8

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

yellow

Optical Properties of Iranite

Gladstone-Dale:

CI meas= -0.31 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.216 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.216,KPDmeas= 0.2328,KC= 0.1777
Ncalc = 2.03 - 2.11

Optical Data:

Biaxial (?), a=2.25, g=2.4-2.5, bire=0.1500-0.2500

Calculated Properties of Iranite

Electron Density:

Bulk Density (Electron Density)=5.30 gm/cc
note: Specific Gravity of Iranite =6.25 gm/cc.

Fermion Index:

Fermion Index = 0.16
Boson Index = 0.84

Photoelectric:

PE_Iranite=1,231.83 barns/electron
U=PE_Iranite x rElectron Density=6,532.05 barns/cc.

Radioactivity:

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

Iranite Classification

Dana Class:

36.01.01.01 (36)Compound Chromates

(36.01)with miscellaneous formulae

(36.01.01)Dana Group

36.01.01.01 Iranite Pb10Cu(CrO4)6(SiO4)2(F,OH)2 P1 1

36.01.01.02 Hemihedrite Pb10Zn(CrO4)6(SiO4)2F2 P1 1

Strunz Class:

07.FC.15 07 - SULFATES (SELENATES, TELLURATES)

07.F - Chromates

07.FC -With PO4, AsO4, SiO4

07.FC.15 Hemihedrite Pb10Zn(CrO4)6(SiO4)2F2 P1 1

07.FC.15 Iranite Pb10Cu(CrO4)6(SiO4)2(F,OH)2 P1 1

Other Iranite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Iranite :
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 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Iranite

Pb10Cu(CrO4)6(SiO4)2(F,OH)2
Dana No: 36.01.01.01 Strunz No: 07.FC.15
Locality:

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