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Iranite

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Big Photo

Chah Khouni Mine (Chah Khoni Mine; Tschah Khuni Mine; El Khun Mine), Anarak District, Esfahan Province (Isfahan Province; Aspadana Province), Iran
© M. Burkhardt

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Formula:
Pb
 
10
Cu(CrO
 
4
)
 
6
(SiO
 
4
)
 
2
(F,OH)
 
2
System:TriclinicHardness:3
Name:
After the type locality in the country of Iran.


Hemihedrite-Iranite Series. The copper analogue of Hemihedrite.

Classification of Iranite

IMA status:Approved
Strunz 8th edition ID:8/B.28-10
Nickel-Strunz 10th (pending) edition ID:7.FC.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
C : With PO4, AsO4, SiO4
Dana 7th edition ID:36.1.1.1
Dana 8th edition ID:36.1.1.1

36 : COMPOUND CHROMATES
1 : Miscellaneous
Hey's CIM Ref.:27.2.8

27 : Sulphites, Chromates, Molybdates and Tungstates
2 : Chromates
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Type Occurrence of Iranite

Type Locality:Sebarz Mine (Sebraz Mine; Sebarg Mine), Anarak District, Esfahan Province (Isfahan Province; Aspadana Province), Iran
Year of Discovery:1963

Physical Properties of Iranite

Hardness (Mohs):3

Crystallography of Iranite

Crystal System:Triclinic
Cell Parameters:a = 10.02Å, b = 9.54Å, c = 9.89Å
α = 104.5°, β = 66°, γ = 108.5°
Ratio:a:b:c = 1.05 : 1 : 1.037
Unit Cell Volume:V 810.96 ų (Calculated from Unit Cell)

Optical Data of Iranite

Type:Biaxial
RI values: nα = 2.250 - 2.300 nγ = 2.400 - 2.500
Maximum Birefringence:δ = 0.150 - 0.200

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong

Chemical Properties of Iranite

Formula:
Pb
 
10
Cu(CrO
 
4
)
 
6
(SiO
 
4
)
 
2
(F,OH)
 
2
Essential elements:Cr, Cu, F, O, Pb, Si
All elements listed in formula:Cr, Cu, F, H, O, Pb, Si
Common Impurities:Zn

Relationship of Iranite to other Species

Series:Forms a series with Hemihedrite (see here)
Related Minerals - Nickel-Strunz Grouping):

- +
7.FC.05Vauquelinite
Pb
 
2
Cu(CrO
 
4
)(PO
 
4
)(OH)
7.FC.10Fornacite
Pb
 
2
Cu(CrO
 
4
)(AsO
 
4
)(OH)
7.FC.10Molybdofornacite
Pb
 
2
Cu(MoO
 
4
,CrO
 
4
)(AsO
 
4
,PO
 
4
)(OH)
7.FC.15Hemihedrite
Pb
 
10
Zn(CrO
 
4
)
 
6
(SiO
 
4
)
 
2
(F,OH)
 
2
7.FC.20Cassedanneite
Pb
 
5
(CrO
 
4
)
 
2
(VO
 
4
)
 
2
 · H
 
2
O
7.FC.20Embreyite
Pb
 
5
(CrO
 
4
)
 
2
(PO
 
4
)
 
2
 · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
27.2.1Tarapacáite
K
 
2
[CrO
 
4
]
27.2.2Lópezite
K
 
2
[Cr
 
2
O
 
7
]
27.2.3Chromatite
Ca[CrO
 
4
]
27.2.4Hashemite
Ba(Cr,S)O
 
4
27.2.5Crocoite
Pb(CrO
 
4
)
27.2.6Phoenicochroite
Pb
 
2
(CrO
 
4
)O
27.2.7Santanaite
Pb
 
11
(CrO
 
4
)O
 
12
27.2.9Hemihedrite
Pb
 
10
Zn(CrO
 
4
)
 
6
(SiO
 
4
)
 
2
(F,OH)
 
2
Related Minerals - Dana Grouping):

- +
36.1.1.2Hemihedrite
Pb
 
10
Zn(CrO
 
4
)
 
6
(SiO
 
4
)
 
2
(F,OH)
 
2

Other Names for Iranite

Synonyms:
Khuniite
Other Languages:
German:Iranit
Spanish:Iranita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Iranite

Reference List:

- +
American Mineralogist (1963): 48: 1417.

American Mineralogist (1976): 61: 186.

Bulletin de la Société française de Minéralogie et de Cristallographie (1980): 103: 469.

Internet Links for Iranite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Iranite details from Handbook of Mineralogy (PDF)
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    • Localities for Iranite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Chile
     
    • Antofagasta Region
      • Antofagasta Province
        • Sierra Gorda District
          • Caracoles
    		M.Dini & A.Molina collection
      • Tocopilla Province
        • Sierra Gorda district
          • Caracoles
    		Peebles F./Ruiz Fuller C.(1988); "Yacimientos Metalíferos de Chile", Fondecyt, Stgo. de Chile.
        • Tocopilla District
    		maurizio dini collection
    Iran
     
    • Esfahan Province (Isfahan Province; Aspadana Province)
      • Anarak District
    Bull.Soc.fr.Min.Crist.(1963) 86, 133-135
    USA
     
    • Arizona
      • Pinal Co.
        • Mammoth District
          • Tiger
            • St. Anthony deposit
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 260.
    • Colorado
      • Moffat Co.
        • Skull Creek District (Blue Mountain District)
    		Minerals of Colorado (1997) Eckels, E. B.
    • Nevada
      • Clark Co.
        • Eldorado District
    		NBMG Spec. Pub. 31 Minerals of Nevada
        • Goodsprings District
    		Rocks & Minerals 83:1 pp 65-69
    • New Mexico
      • Socorro Co.
    		Minerals of New Mexico 3rd ed.
          • Silver Hill area
    		Minerals of New Mexico 3rd ed.
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