Yakovenchukite-(Y) (original) (raw)

A valid IMA mineral species

Formula:

K3NaCaY2[Si12O30] · 4H2O

Colour:

Creamy to colourless

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. The suffix/modifier follows the Levinson rule for minerals with essential REE, and denotes predominant yttrium.

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.

Unique IdentifiersHide

This section is currently hidden. Click the show button to view.

Long-form identifier:

mindat:1:1:29094:6

1e606c19-8c0c-491b-86fd-11e9fadf4d2d

IMA Classification of Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

IMA Formula:

K3NaCaY2Si12O30 · 4H2O

Classification of Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

9.EF.30

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

Mineral SymbolsHide

This section is currently hidden. Click the show button to view.

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

Colour:

Creamy to colourless

Cleavage:

Perfect
On {100}, perfect; on {010}, distinct.

Density:

2.83 g/cm3 (Measured) 2.72 g/cm3 (Calculated)

Optical Data of Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

Optical Extinction:

Y = c, X = a, Z = b.

Pleochroism:

Non-pleochroic

Chemistry of Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

Mindat Formula:

K3NaCaY2[Si12O30] · 4H2O

Crystallography of Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

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

This section is currently hidden. Click the show button to view.

Powder Diffraction Data:

Geological EnvironmentHide

This section is currently hidden. Click the show button to view.

Type Occurrence of Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

General Appearance of Type Material:

Small prismatic crystals.

Place of Conservation of Type Material:

Mineralogical Museum, St. Petersburg State University, Russia (1/19174).

Geological Setting of Type Material:

Narrow sodalite-aegirine-microcline veinlet cutting ijolite-urtite in an alkaline massif.

Associated Minerals at Type Locality:

Synonyms of Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

Related Minerals - Strunz-mindat GroupingHide

This section is currently hidden. Click the show button to view.

Fluorescence of Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

Other InformationHide

This section is currently hidden. Click the show button to view.

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

References for Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

Reference List:

Krivovichev, S. V., Pakhomovsky, Y. A., Ivanyuk, G. Yu., Mikhailova, J. A., Men'shikov, Y. P., Armbruster, T., 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 (8) 1525-1530 doi:10.2138/am.2007.2488

Localities for Yakovenchukite-(Y)Hide

This section is currently hidden. Click the show button to view.

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 section is currently hidden. Click the show button to view.

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.