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Tsepinite-Ca

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About Tsepinite-CaHide

Formula:
Ca(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O
Colour:
White, colourless, pale brownish
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.73
Crystal System:
Monoclinic
Name:
Named 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-Ca.


Classification of Tsepinite-CaHide

Approved
Approval Year:
2002
9.CE.30b

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

Physical Properties of Tsepinite-CaHide

Vitreous
Transparency:
Transparent
Colour:
White, colourless, pale brownish
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.73(1) g/cm3 (Measured)    2.72 g/cm3 (Calculated)

Optical Data of Tsepinite-CaHide

Type:
Biaxial (+)
RI values:
nα = 1.666 nβ = 1.676 nγ = 1.780
2V:
Measured: 30° , Calculated: 36°
Max Birefringence:
δ = 0.114
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
very weak: r < n.
Pleochroism:
Non-pleochroic

Chemical Properties of Tsepinite-CaHide

Formula:
Ca(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O
IMA Formula:
(Ca,K,Na)2-x(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2O
Common Impurities:
K,Na

Crystallography of Tsepinite-CaHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 14.484 Å, b = 14.191 Å, c = 7.907 Å
β = 117.26°
Ratio:
a:b:c = 1.021 : 1 : 0.557
Unit Cell V:
1,444.72 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Combine both in sheaf-like clusters up to 2 x 6mm large and chaotic open-worked aggregates up to 1cm as maximum dimension.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.02(60)
6.38(40)
3.53(45)
3.16(100)
2.62(45)
2.51(85)
1.718(50)
Comments:
From Type Description.

Type Occurrence of Tsepinite-CaHide

General Appearance of Type Material:
Coarse long-prismatic to needle-shaped crystals up to 0.2 x 0.6 x 5mm in size.
Geological Setting of Type Material:
In cavities of replaced rinkite
Associated Minerals at Type Locality:

Synonyms of Tsepinite-CaHide

Other Language Names for Tsepinite-CaHide

Simplified Chinese:水硅铌钛钙石
Traditional Chinese:水矽鈮鈦鈣石

Relationship of Tsepinite-Ca to other SpeciesHide

Other Members of this group:
Tsepinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. 2/m : B2/m
Tsepinite-NaNa2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon.
Tsepinite-SrSr(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
Vuoriyarvite-KK2(Nb,Ti)2(Si4O12)(O,OH)2 · 4H2OMon.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Pyatenkoite-(Y)3 photos of Tsepinite-Ca associated with Pyatenkoite-(Y) on mindat.org.
Kentbrooksite3 photos of Tsepinite-Ca associated with Kentbrooksite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.CE.05PapagoiteCaCu[H3AlSi2O9]Mon.
9.CE.10VerplanckiteBa2(Mn,Fe,Ti)Si2O6(O,OH,Cl,F)2 · 3H2O or nearHex.
9.CE.15BaotiteBa4Ti8Si4O28ClTet. 4/m : I41/a
9.CE.20NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2ClOrth. mmm (2/m 2/m 2/m) : Pmmn
9.CE.20TaramelliteBa4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm (2/m 2/m 2/m) : Pmmn
9.CE.20TitantaramelliteBa4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2ClxOrth.
9.CE.25Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2OOrth.
9.CE.25Byelorussite-(Ce)NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2O
9.CE.25Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2OMon. 2 : B2
9.CE.25Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
9.CE.25StrontiojoaquiniteSr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2OMon.
9.CE.25Strontio-orthojoaquinite(Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2OOrth.
9.CE.25Orthojoaquinite-(La)NaBa2La2Fe2+Ti2[Si4O12]2O2(O,OH) · H2OOrth.
9.CE.30eLabuntsovite-MnNa4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10-12H2OMon.
9.CE.30aNenadkevichite(Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pbam
9.CE.30dLemmleinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2OOrth.
9.CE.30aKorobitsyniteNa2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2OOrth. mmm (2/m 2/m 2/m) : Pbam
9.CE.30cKuzmenkoite-MnK2Mn2+(Ti,Nb)4(Si4O12)2(OH,O)4 · 5-6H2OMon.
9.CE.30bVuoriyarvite-KK2(Nb,Ti)2(Si4O12)(O,OH)2 · 4H2OMon.
9.CE.30bTsepinite-NaNa2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon.
9.CE.30cKarupmøllerite-Ca(Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2O
9.CE.30eLabuntsovite-MgNa4K4(Ba,K)2Mg(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2OMon.
9.CE.30eLabuntsovite-FeNa4K4(Ba,K)2Fe2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2OMon.
9.CE.30dLemmleinite-BaNa2K2Ba(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2OMon. 2/m : B2/m
9.CE.30cGjerdingenite-FeK2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30hNeskevaaraite-FeK3Na2Fe2+(Ti,Nb)4(Si4O12)2(O,OH)4 · 5-6 H2OMon. m : Bm
9.CE.30bTsepinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. 2/m : B2/m
9.CE.30bParatsepinite-BaBa4(Ti,Nb)8(Si4O12)4(OH,O)8 · 8H2O
9.CE.30hAlsakharovite-ZnNaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2OMon. m : Bm
9.CE.30cGjerdingenite-MnK2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30cLepkhenelmite-Zn(Ba,K)2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2OMon. m : Bm
9.CE.30bTsepinite-SrSr(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
9.CE.30bParatsepinite-Na(Na,Sr,K,Ca)7(Ti,Nb)8(Si4O12)4(O,OH)8·nH2O n ~ 8Mon. 2/m : B2/m
9.CE.30fParalabuntsovite-MgNa8K8Mg4Ti16(Si4O12)8(OH,O)16 · 20-24H2OMon. 2/m
9.CE.30cGjerdingenite-CaK2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30cGjerdingenite-NaK2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2OMon. 2/m : B2/m
9.CE.30hGutkovaite-MnK2CaMn(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2OMon.
9.CE.30cKuzmenkoite-ZnK2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8H2OMon. m : Bm
9.CE.30gOrganovaite-MnK2Mn(Nb,Ti)4(Si4O12)2(O,OH)4 · 5-7H2OMon. 2/m : B2/m
9.CE.30gOrganovaite-ZnK2Zn(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O
9.CE.30gParakuzmenkoite-Fe(K,Ba)4Fe(Ti,Nb)8(Si4O12)4(O,OH)8 · 14H2OMon. 2/m : B2/m
9.CE.30cBurovaite-Ca(Na,K)4Ca2(Ti,Nb)8(Si4O12)4(OH,O)8 · 12H2OMon. 2/m : B2/m
9.CE.45Komarovite(Ca,Mn)Nb2[O3|Si2O7] · 3.5H2OOrth.
9.CE.45Natrokomarovite(Na,Ca,H)2Nb2Si2O10(OH,F)2 · H2OOrth.

Fluorescence of Tsepinite-CaHide

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 Tsepinite-CaHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I. V., Chukanov, N. V., Ferraris, G., Gula, A., Pushcharovsky, D. Y., & Zadov, A. E. (2003). Tsepinite–Ca,(Ca, K, Na,□) 2 (Ti, Nb) 2 (Si4O12)(OH, O) 2· 4H2O, a new mineral of the labuntsovite group from the Khibiny alkaline massif, Kola Peninsula–Novel disordered sites in the vuoriyarvite-type structure. Neues Jahrbuch für Mineralogie-Monatshefte, 2003(10), 461-480.

Internet Links for Tsepinite-CaHide

Localities for Tsepinite-CaHide

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
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
        • Eveslogchorr Mt
          • Astrophyllite Stream
Pekov et al (2005) New Data on Minerals Vol 40 pp11-16
        • Yukspor Mt
          • Hackman Valley
Pekov, I. V., Chukanov, N. V., Ferraris, G., Gula, A., Pushcharovsky, D. Y., & Zadov, A. E. (2003). Tsepinite–Ca,(Ca, K, Na,□) 2 (Ti, Nb) 2 (Si4O12)(OH, O) 2· 4H2O, a new mineral of the labuntsovite group from the Khibiny alkaline massif, Kola Peninsula–Novel disordered sites in the vuoriyarvite-type structure. Neues Jahrbuch für Mineralogie-Monatshefte, 2003(10), 461-480.
Mineral and/or Locality  
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