Shibkovite (original) (raw)

A valid IMA mineral species

About ShibkoviteHide

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Formula:

K(◻K)Ca2Zn3[Si12O30]

Previously given as K(□,K,Na)2Zn3Ca2[Si12O30].

Name:

Named after two prominent Russian geologists, Viktor Sergeevitch Shibkov (Виктор Сергеевич Шибков) (1926-1992) and Nikolai Viktorovitch Shibkov (Николай Викторович Шибков) (1951-1991), who both spent their professional lives working on the geology of Soviet Asia.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:7290:4

b3a6f10d-d3aa-4662-970b-344b6aa444b6

IMA Classification of ShibkoviteHide

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IMA Formula:

K2Ca2(Zn3Si12)O30

Type description reference:

Classification of ShibkoviteHide

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9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)

Mineral SymbolsHide

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

Physical Properties of ShibkoviteHide

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Hardness:

VHN50=609 kg/mm2 - Vickers

Density:

2.89(2) g/cm3 (Measured) 2.90(5) g/cm3 (Calculated)

Optical Data of ShibkoviteHide

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RI values:

_n_ω = 1.561 _n_ε = 1.563

δ = 0.002

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of ShibkoviteHide

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Mindat Formula:

K(◻K)Ca2Zn3[Si12O30]

Previously given as K(□,K,Na)2Zn3Ca2[Si12O30].

Crystallography of ShibkoviteHide

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Class (H-M):

6/m m m _(_6/_m_2/_m_2/m ) - Dihexagonal Dipyramidal

Cell Parameters:

a = 10.505 Å, c = 14.185 Å

Unit Cell V:

1,355.66 ų (Calculated from Unit Cell)

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of ShibkoviteHide

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General Appearance of Type Material:

Occurs as white to colorless equant grains, to 0.5 mm, resembling quartz.

Place of Conservation of Type Material:

Museum of the Ilmensky National Park at Miass, Russia, and in the A. E. Fersman Mineralogical Museum, Moscow, Russia.

Associated Minerals at Type Locality:

Reference:

Pautov, L.A., Agakhanov, A.A., Sokolova, E.V. (1998) Shibkovite K(Ca,Mn,Na)2(K2-x□x)2Zn3Si12O30 — the new mineral from the milarite group. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 127(4): 89-94.

Synonyms of ShibkoviteHide

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Other Language Names for ShibkoviteHide

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Relationship of Shibkovite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of ShibkoviteHide

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Bright red fluorescence in short-wave ultraviolet light

Other InformationHide

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IR Spectrum:

Bands at 495, 530, 575, 700, 790, 920, 940, 1000, 1048, and 1105 cm–1.

Notes:

Insoluble in water and 1:1 HCl

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 ShibkoviteHide

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References for ShibkoviteHide

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Localities for ShibkoviteHide

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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

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- 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.