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Ivanyukite-K

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About Ivanyukite-KHide

Formula:
K2Ti4(SiO4)3(OH)2O2 · 9H2O
Colour:
Pale blue
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.70
Crystal System:
Isometric
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
Compare other members of the group: ivanyukite-Na and ivanyukite-Cu. Ivanyukite-K is not analogous to these members (amount of water, oxide and hydroxide anions vary).

The structure of all ivanyukites is described as a 3D framework of the pharmacosiderite type; it is based on of four edge-sharing TiO6 octahedra connected by the silicate tetrahedra. It contains 8-membered rings defininng channels with an effective width of 3.5 Å. K, Na and water reside within the channels.


Classification of Ivanyukite-KHide

Approved
Approval Year:
2007

Physical Properties of Ivanyukite-KHide

Vitreous
Transparency:
Translucent
Colour:
Pale blue
Streak:
White
Hardness:
Comment:
ca. 4
Tenacity:
Brittle
Cleavage:
Perfect
{100}
Fracture:
Step-Like
Density:
2.70 g/cm3 (Measured)    2.69 g/cm3 (Calculated)

Optical Data of Ivanyukite-KHide

Type:
Isotropic
RI values:
n = 1.73(1)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
High

Chemical Properties of Ivanyukite-KHide

Formula:
K2Ti4(SiO4)3(OH)2O2 · 9H2O
IMA Formula:
K2[Ti4O2(OH)2(SiO4)3] · 9H2O
Common Impurities:
Cu,Ca,Nb

Crystallography of Ivanyukite-KHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
P4 3m
Cell Parameters:
a = 7.808(2) Å
Unit Cell V:
476.01 ų (Calculated from Unit Cell)
Z:
1

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.85 (100)
3.91 (20)
3.201 (80)
2.602 (30)
2.471 (40)
1.951 (30)
1.839 (30)

Type Occurrence of Ivanyukite-KHide

General Appearance of Type Material:
cubic crystals, up to 1.5 mm in diameter
Geological Setting of Type Material:
natrolitized microcline-aegirine-sodalite lens within orthoclase-bearing urtite; formed from ivanyukite-Na-T by its partial hydration and cation exchange
Associated Minerals at Type Locality:

Synonyms of Ivanyukite-KHide

Relationship of Ivanyukite-K to other SpeciesHide

Other Members of this group:
Ivanyukite-CuCuTi4(SiO4)3(OH)2O2 · 7H2OIso. 4 3m : P4 3m
Ivanyukite-NaNa2Ti4(SiO4)3(OH)2O2 · 6H2OTrig. 3m : R3m
Ivanyukite-Na-CNa2Ti4(SiO4)3(OH)2O2 · 6H2OIso. 4 3m : P4 3m

Other InformationHide

IR Spectrum:
14 absorption bands from Si-O, Ti-O, molecular water and OH groups vibrations
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-KHide

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-KHide

Localities for Ivanyukite-KHide

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
IMA website - Proposals approved December 2007; American Mineralogist, Volume 94, pages 1450–1458, 2009
Mineral and/or Locality  
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