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Ivanyukite-Na-T

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Formula:
Na2Ti4(SiO4)3(OH)O3 · 7H2O
Colour:
Colorless to pale brown
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.70
Crystal System:
Trigonal
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


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Classification of Ivanyukite-Na-THide

Approved
Approval Year:
2007

Physical Properties of Ivanyukite-Na-THide

Vitreous
Transparency:
Transparent
Colour:
Colorless to pale brown
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
on {1011}
Fracture:
Step-Like
Density:
2.70 g/cm3 (Measured)    2.58 g/cm3 (Calculated)

Optical Data of Ivanyukite-Na-THide

Type:
Uniaxial (+)
RI values:
nω = 1.760() nε = 1.850(9)
Max Birefringence:
δ = 0.090
Image 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-THide

Formula:
Na2Ti4(SiO4)3(OH)O3 · 7H2O
IMA Formula:
Na3Ti4(SiO4)3O3(OH) · 7H2O

Crystallography of Ivanyukite-Na-THide

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 V:
1,434.17 ų (Calculated from Unit Cell)
Z:
3

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.88(100)
3.277(60)
3.175(80)
2.730(50)
2.607(70)
2.471(50)
1.960(60)
1.916(50)

Type Occurrence of Ivanyukite-Na-THide

General Appearance of Type Material:
cubic crystals, up to 1.5 mm in diameter
Geological Setting of Type Material:
low-temperature hydrothermal mineral crystallized from supersaturated Na-rich aqueous solutions; precursor to other ivanyukites (by partial hydration and cation exchange)
Associated Minerals at Type Locality:

Other InformationHide

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 Ivanyukite-Na-THide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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-THide

Localities for Ivanyukite-Na-THide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
        • Koashva Mt
American Mineralogist, Volume 94, pages 1450–1458, 2009
Mineral and/or Locality  
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