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Yakovenchukite-(Y)

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Viktor N. Yakovenchuk
Formula:
K3NaCaY2[Si12O30] · 4H2O
Colour:
Creamy to colourless
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.83
Crystal System:
Orthorhombic
Name:
After Victor N. Yakovenchuk, Russian mineralogist at the Geological Institute of the Kola Science centre of the Russian Academy of Sciences, in view of his outstanding contributions to the mineralogy of alkaline and alkaline-ultrabasic massifs.
A secondary low-temperature hydrothermal mineral formed by alteration of earlier REE-rich minerals

A mineral with a new structure type of minerals and inorganic compounds based on a microporous octahedral-tetrahedral framework of SiO4-tetrahedra and YO6-octahedra. Silicate tetrahedra share corners to form unprecedented Si12O30 sheets consisting of 4-, 6-, and 14-membered rings. The sheets are parallel to (001) and are linked into a 3-dimensional framework through YO6 octahedra. CA2+, K+, and Na+ cations are located within the framework cavities. The framework possesses channels extending along the a axis.


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Classification of Yakovenchukite-(Y)Hide

Approved
Approval Year:
2006
9.EF.30

9 : SILICATES (Germanates)
E : Phyllosilicates
F : Single nets with 6-membered rings, connected by M[4], M[8], etc.

Physical Properties of Yakovenchukite-(Y)Hide

Vitreous
Transparency:
Transparent
Colour:
Creamy to colourless
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
On {100}, perfect; on {010}, distinct.
Fracture:
Step-Like
Density:
2.83 g/cm3 (Measured)    2.72 g/cm3 (Calculated)

Optical Data of Yakovenchukite-(Y)Hide

Type:
Biaxial (+)
Pleochroism:
Non-pleochroic

Chemical Properties of Yakovenchukite-(Y)Hide

Formula:
K3NaCaY2[Si12O30] · 4H2O
IMA Formula:
K3NaCaY2Si12O30 · 4H2O

Crystallography of Yakovenchukite-(Y)Hide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pcca
Cell Parameters:
a = 14.972 Å, b = 14.137 Å, c = 14.594 Å
Ratio:
a:b:c = 1.059 : 1 : 1.032
Unit Cell V:
3,088.95 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.00 (4)
6.57 (6)
5.25 (3)
4.20 (5)
3.337 (10)
3.248 (9)
3.101 (4)
3.014 (8)

Type Occurrence of Yakovenchukite-(Y)Hide

Synonyms of Yakovenchukite-(Y)Hide

Related Minerals - Nickel-Strunz GroupingHide

9.EF.05PetaliteLiAl(Si4O10)Mon. 2/m : P2/b
9.EF.10SanborniteBa2(Si4O10)Orth.
9.EF.15SearlesiteNa(H2BSi2O7)Mon. 2 : P21
9.EF.20SilinaiteNaLiSi2O5 · 2H2OMon. 2/m
9.EF.25KanemiteHNaSi2O5 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pnma

Fluorescence of Yakovenchukite-(Y)Hide

Non-fluorescent.

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 Yakovenchukite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Krivovichev, S.V., Pakhomovsky, Ya.A., Ivanyuk, G.Yu., Mikhailova, J.A., Men’shikov, Yu.P., Armbruster, Th., Selivanova, E.A., Meisser, N. (2007): Yakovenchukite-(Y), K3NaCaY2(Si12O30)(H2O)4, a new mineral from the Khibiny massif, Kola Peninsula, Russia: A novel type of octahedral-tetrahedral open-framework structure. American Mineralogist, 92, 1525-1530.

Internet Links for Yakovenchukite-(Y)Hide

Localities for Yakovenchukite-(Y)Hide

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
        • Kukisvumchorr Mt
          • Kirovskii apatite mine (Kirovsky Mine; Kirovskii Mine; Kirov Mine)
American Mineralogist, Volume 92, pages 1525-1530, 2007
Mineral and/or Locality  
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