Tsepinite-K (original) (raw)

A valid IMA mineral species

About Tsepinite-KHide

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Formula:

K2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O

Crystal System:

Monoclinic

Name:

Named for its relationship to the previously described tsepinite-Na, with K dominant over Na. The root name is after Anatoliy Ivanovich Tsepin (b. 1946), physicist of the Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences (IGEM), specialist in X-ray spectroscopy and the electron-microprobe analysis of minerals, who initiated in the 1970s an electron-microprobe investigation of Labuntsovite Group minerals.

This page provides mineralogical data about Tsepinite-K.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:26355:3

84552c8e-7eea-4ced-8642-3e0e0e8a90c8

IMA Classification of Tsepinite-KHide

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IMA Formula:

(K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O

Type description reference:

Chukanov, N. V., Pekov, I. V., Zadov, A. E., Rosenberg, K. A., Rastsvetaeva, R. K., Krivovichev, S. V., Levitskay, L. A. (2003) New minerals tsepinite-K (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3H2O and paratsepinite-Ba (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4H2O and their relationship with other labuntsovite group members. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 132 (1) 38-51

Classification of Tsepinite-KHide

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9.CE.30b

9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions

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 Tsepinite-KHide

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Density:

2.88(3) g/cm3 (Measured) 2.97 g/cm3 (Calculated)

Optical Data of Tsepinite-KHide

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RI values:

_n_α = 1.690(3) _n_β = 1.701(3) _n_γ = 1.800(5)

δ = 0.110

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

Chemistry of Tsepinite-KHide

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Mindat Formula:

K2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O

Crystallography of Tsepinite-KHide

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Crystal System:

Monoclinic

Cell Parameters:

a = 14.326(2) Å, b = 13.802(2) Å, c = 7.783(1) Å
β = 116.949(3)°

Ratio:

a:b:c = 1.038 : 1 : 0.564

Crystal StructureHide

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Geological EnvironmentHide

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Type Occurrence of Tsepinite-KHide

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General Appearance of Type Material:

Short-prismatic colourless crystals up to 0.4 mm length and in pseudomorphs after murmanite.

Place of Conservation of Type Material:

A. E. Fersman Mineralogica1 Museum, Russian Academy of Sciences, Moscow, Russia.

Geological Setting of Type Material:

Associated Minerals at Type Locality:

Reference:

Chukanov, N.V., Pekov, I.V., Zadov, A.E., Rosenberg, K.A., Rastsvetaeva, R.K., Krivovichev, S.V., Levitskay, L.A. (2003) New minerals tsepinite-K (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3H2O and paratsepinite-Ba (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4H2O and their relationship with other labuntsovite group members. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 132(1): 38-51.

Synonyms of Tsepinite-KHide

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Other Language Names for Tsepinite-KHide

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Relationship of Tsepinite-K 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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Other InformationHide

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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 Tsepinite-KHide

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References for Tsepinite-KHide

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Reference List:

Chukanov, N. V., Pekov, I. V., Zadov, A. E., Rosenberg, K. A., Rastsvetaeva, R. K., Krivovichev, S. V., Levitskay, L. A. (2003) New minerals tsepinite-K (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3H2O and paratsepinite-Ba (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4H2O and their relationship with other labuntsovite group members. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 132 (1) 38-51

Localities for Tsepinite-KHide

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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.