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Ilmajokite

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Formula:
(Na,Ce,Ba)
 
2
TiSi
 
3
O
 
5
(OH)
 
10
· nH
 
2
O
System:MonoclinicColour:Bright yellow
Hardness:1
This page provides mineralogical data about Ilmajokite.

Classification of Ilmajokite

IMA status:Approved
Strunz 8th edition ID:8/B.16-20
Nickel-Strunz 10th (pending) edition ID:9.HB.05

9 : SILICATES (Germanates)
H : Unclassified silicates
B : With Ti, V, Cr
Dana 8th edition ID:78.7.5.1

78 : Unclassified Silicates
7 :
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Type Occurrence of Ilmajokite

Type Locality:Yubileinaya pegmatite (Yubileinoye; Jubilejnaja), Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Year of Discovery:1972

Physical Properties of Ilmajokite

Colour:Bright yellow
Hardness (Mohs):1

Crystallography of Ilmajokite

Crystal System:Monoclinic
Cell Parameters:a = 23Å, b = 24.4Å, c = 37Å
Ratio:a:b:c = 0.943 : 1 : 1.516
Unit Cell Volume:V 0.00 ų (Calculated from Unit Cell)

Optical Data of Ilmajokite

Type:Biaxial (+)
RI values: nα = 1.573 nβ = 1.576 nγ = 1.579
2V:Measured: 90° , Calculated: 88°
Maximum Birefringence:δ = 0.006

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

Chemical Properties of Ilmajokite

Formula:
(Na,Ce,Ba)
 
2
TiSi
 
3
O
 
5
(OH)
 
10
· nH
 
2
O
Simplified for copy/paste:(Na,Ce,Ba)2TiSi3O5(OH)10·nH2O
Essential elements:H, Na, O, Si, Ti
All elements listed in formula:Ba, Ce, H, Na, O, Si, Ti
Common Impurities:Zr,Al,TR,Fe,Nb,Ta,Ca,Sr,K,C

Relationship of Ilmajokite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.HB.10Rilandite
Cr
 
4
Al
 
2
SiO
 
11
· 5H
 
2
O or near

Other Names for Ilmajokite

Synonyms:
IMA1971-027
Other Languages:
German:Ilmajokit
Spanish:Ilmajokita

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 Ilmajokite

Reference List:

- +
American Mineralogist (1973): 58: 139.

Internet Links for Ilmajokite

Search Engines:
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  • External Links:
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  • Look for Ilmajokite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Ilmajokite details from Handbook of Mineralogy (PDF)
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  • Localities for Ilmajokite

    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.
    (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.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Lovozero Massif
            • Karnasurt Mt
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pluth, J. J., Smith, J. V., Pushcharovsky, D. Y., Semenov, E. I., Bram, A., Riekel, C., ... & Broach, R. W. (1997). Third-generation synchrotron x-ray diffraction of 6-μm crystal of raite,≈ Na3Mn3Ti0. 25Si8O20 (OH) 2⋅ 10H2O, opens up new chemistry and physics of low-temperature minerals. Proceedings of the National Academy of Sciences, 94(23), 12263-12267.
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