Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Iraqite-(La)

Formula:
K(Ca,Na)
 
2
(La,Ce,Th)[(Si,Al)
 
8
O
 
20
]
System:TetragonalHardness:4½
This page provides mineralogical data about Iraqite-(La).

Classification of Iraqite-(La)

IMA status:Approved
Strunz 8th edition ID:8/E.10-20
Nickel-Strunz 10th (pending) edition ID:9.CH.10

9 : SILICATES (Germanates)
C : Cyclosilicates
H : [Si4O12]8- 4-membered double rings
Dana 8th edition ID:63.1.1.2

63 : CYCLOSILICATES Condensed Rings
1 : Condensed Rings (Steacyite group)
Hey's CIM Ref.:14.8.8

14 : Silicates not Containing Aluminum
8 : Silicates of Group III metals other than Al
mindat.org URL:http://www.mindat.org/min-2041.html
Please feel free to link to this page.

Type Occurrence of Iraqite-(La)

Type Locality:Shakhi-Rash Mt., Hero, Qala-Diz (Qala-Dizeh; Qala-Diza), Iraq

Physical Properties of Iraqite-(La)

Hardness (Mohs):4½

Crystallography of Iraqite-(La)

Crystal System:Tetragonal

Optical Data of Iraqite-(La)

Type:Uniaxial (-)
RI values: nω = 1.590 nε = 1.585
Maximum Birefringence:δ = 0.005

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

Chemical Properties of Iraqite-(La)

Formula:
K(Ca,Na)
 
2
(La,Ce,Th)[(Si,Al)
 
8
O
 
20
]
Essential elements:Ca, K, La, O, Si
All elements listed in formula:Al, Ca, Ce, K, La, Na, O, Si, Th

Relationship of Iraqite-(La) to other Species

Related Minerals - Nickel-Strunz Grouping):
9.CH.05Hyalotekite
(Ba,Pb,Ca,K)
 
6
(B,Si,Al)
 
2
(Si,Be)
 
10
O
 
28
(F,Cl)
9.CH.05Kapitsaite-(Y)
(Ba,K,Pb)
 
4
(Y,Ca)
 
2
Si
 
8
(B,Si)
 
4
O
 
28
F
9.CH.10Steacyite
([ ],K)(Na,Ca)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.CH.10Turkestanite
(K,[ ])(Ca,Na)
 
2
(Th,U)[Si
 
8
O
 
20
] · nH
 
2
O
9.CH.10Arapovite
(K,[ ])(Ca,Na)
 
2
(U,Th)[Si
 
8
O
 
20
] · H
 
2
O
Related Minerals - Hey's Index Grouping:
14.8.1Thalénite-(Y)
Y
 
3
Si
 
3
O
 
10
(OH)
14.8.2Keiviite-(Y)
(Y,Yb)
 
2
[Si
 
2
O
 
7
]
14.8.3Keiviite-(Yb)
(Yb,Y)
 
2
[Si
 
2
O
 
7
]
14.8.4Tombarthite-(Y)
Y
 
4
[HSiO
 
4
]
 
3
14.8.5Thortveitite
(Sc,Y)
 
2
[Si
 
2
O
 
7
]
14.8.6Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
14.8.7Monteregianite-(Y)
(Na,K)
 
6
(Y,Ca)
 
2
Si
 
16
O
 
38
·10H
 
2
O
14.8.9Ashcroftine-(Y)
K
 
5
Na
 
5
(Y,Ca)
 
12
Si
 
28
O
 
70
(OH)
 
2
(CO
 
3
)
 
8
·8H
 
2
O
14.8.10Nordite-(La)
(La,Ce)(Sr,Ca)Na
 
2
(Na,Mn)(Zn,Mg)Si
 
6
O
 
17
14.8.11Nordite-(Ce)
(Ce,La)(Sr,Ca)Na
 
2
(Na,Mn)(Zn,Mg)Si
 
6
O
 
17
14.8.12Jervisite
(Na,Ca,Fe
2+
 
)(Sc,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
14.8.13Cerite-(Ce)
(Ce,Ca)
 
9
(Mg,Fe)Si
 
7
(O,OH,F)
 
28
14.8.14Cascandite
Ca(Sc,Fe
3+
 
)[HSi
 
3
O
 
9
]

Other Names for Iraqite-(La)

Synonyms:
IMA1973-041
German names:
Irakit-(La)

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 Iraqite-(La)

Reference List:American Mineralogist: 61: 1054.

Mineralogical Magazine: 40: 441-445.

Canadian Mineralogist: (1982): 20: 59-63.

Internet Links for Iraqite-(La)

Search Engines:
  • Look for Iraqite-(La) on Google
  • Look for Iraqite-(La) images on Google
    • External Links:
  • Look for Iraqite-(La) on Webmineral
  • Look for Iraqite-(La) on Athena Mineralogy
  • Look for Iraqite-(La) on Wikipedia
  • Look for Iraqite-(La) on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Iraqite-(La) in the Natural History Museum (London) online catalogue
  • Iraqite-(La) details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Search for Iraqite-(La) on minvision.com
  • Rare and Unusual minerals at Mineralogical Research Company
  • rare and unusual minerals mainly crystallized
  • Wendel Minerals - Auktion & Shop
  • The Arkenstone - Fine Minerals
  • Fine Minerals from Dan Weinrich Minerals
  • Wilensky Fine Minerals
  • Search for Iraqite-(La) at Thames Valley Minerals
  • Lapis Mineral Magazin
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Buy from David K Joyce minerals
  • Buy Fine Minerals from mineralsweb.com
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Iraqite-(La)

    (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.
    Iraq
     
    • Qala-Diz (Qala-Dizeh; Qala-Diza)
      • Hero
    		Mineral. Mag., 40, 441-445.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.