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(Na,Ce,Ba)2TiSi3O5(OH)10 · nH2O
Bright yellow
This page provides mineralogical data about Ilmajokite.

Classification of Ilmajokite


9 : SILICATES (Germanates)
H : Unclassified silicates
B : With Ti, V, Cr

78 : Unclassified Silicates
7 : URL:
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Type Occurrence of Ilmajokite

Year of Discovery:

Physical Properties of Ilmajokite

Bright yellow
Hardness (Mohs):

Crystallography of Ilmajokite

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

Optical Data of Ilmajokite

Biaxial (+)
RI values:
nα = 1.573 nβ = 1.576 nγ = 1.579
Measured: 90° , Calculated: 88°
Max Birefringence:
δ = 0.006
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
r < v strong

Chemical Properties of Ilmajokite

(Na,Ce,Ba)2TiSi3O5(OH)10 · nH2O
Essential elements:
All elements listed in formula:
Common Impurities:

Relationship of Ilmajokite to other Species

Other Names for Ilmajokite

Name in Other Languages:

Other Information

Health Risks:
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

Localities for Ilmajokite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL)
  • 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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