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· 7H
System:TrigonalColour:Colorless to pale brown
Name:Named in honor of Gregory Yur’evich Ivanyuk, Russian mineralogist and petrologist, head of the Laboratory of Self-Organized Mineral Systems in the Geological Institute of the Kola Science Centre of the Russian Academy of Sciences.
A polytype of Ivanyukite-Na

Classification of Ivanyukite-Na-T

IMA status:Approved 2007
mindat.org URL:http://www.mindat.org/min-39652.html
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Type Occurrence of Ivanyukite-Na-T

Type Locality:Koashva quarry, Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Geological Setting of type material:Ivanyukite-Na-T is a low-temperature hydrothermal mineral crystallized from supersaturated Na-rich aqueous solutions

Physical Properties of Ivanyukite-Na-T

Diaphaneity (Transparency):Transparent
Colour:Colorless to pale brown
Hardness (Mohs):4
on {1011}
Density (measured):2.7 g/cm3
Density (calculated):2.384 g/cm3

Crystallography of Ivanyukite-Na-T

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Cell Parameters:a = 10.921(3) Å, c = 13.885(4) Å
Ratio:a:c = 1 : 1.271
Unit Cell Volume:V 1,434.17 ų (Calculated from Unit Cell)

Optical Data of Ivanyukite-Na-T

Type:Uniaxial (+)
RI values: nω = 1.760() nε = 1.850(9)
Maximum Birefringence:δ = 0.090

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

Chemical Properties of Ivanyukite-Na-T

· 7H
Simplified for copy/paste:Na2Ti4(SiO4)3(OH)O3·7H2O
Essential elements:H, Na, O, Si, Ti
All elements listed in formula:H, Na, O, Si, Ti

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 Ivanyukite-Na-T

Reference List:

- +
Victor N. Yakovenchuk, Alexander P. Nikolaev, Ekaterina A. Selivanova, Yakov A. Pakhomovsky, Julia A. Korchak, Dar’ya V. Spiridonova, Oleg A. Zalkind, and Sergey V. Krivovichev (2009): Ivanyukite-Na-T, ivanyukite-Na-C, ivanyukite-K, and ivanyukite-Cu: New microporous titanosilicates from the Khibiny massif (Kola Peninsula, Russia) and crystal structure of ivanyukite-Na-T. American Mineralogist, 94, 1450–1458.

Internet Links for Ivanyukite-Na-T

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Localities for Ivanyukite-Na-T

    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.
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Koashva Mt
    American Mineralogist, Volume 94, pages 1450–1458, 2009
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