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Tsepinite-Sr

A valid IMA mineral species
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07717060017272470948206.jpg
Tsepinite-Sr

Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
06533090017272007717562.jpg
Tsepinite-Sr

Pegmatite, Astrophyllite Stream, Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
07717060017272470948206.jpg
Tsepinite-Sr

Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
06533090017272007717562.jpg
Tsepinite-Sr

Pegmatite, Astrophyllite Stream, Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
07717060017272470948206.jpg
Tsepinite-Sr

Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
08530990017272007726798.jpg
Tsepinite-Sr

Pegmatite, Astrophyllite Stream, Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
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About Tsepinite-SrHide

Formula:
Sr(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O
Colour:
Clear to white
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.67
Crystal System:
Monoclinic
Name:
Named for its relationship to other tsepinite species, with Sr dominant over Na, Ca, and K. The root name is for 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.
Labuntsovite Group.


Unique IdentifiersHide

Mindat ID:
27458
Long-form identifier:
mindat:1:1:27458:6

IMA Classification of Tsepinite-SrHide

Classification of Tsepinite-SrHide

Strunz-mindat (2025):
9.CE.30b

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

Mineral SymbolsHide

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

SymbolSourceReference
Tsp-SrIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Tsepinite-SrHide

Lustre:
Vitreous
Transparency:
Transparent, Translucent
Colour:
Clear to white
Streak:
White
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.67(2) g/cm3 (Measured)    2.63(1) g/cm3 (Calculated)

Optical Data of Tsepinite-SrHide

Type:
Biaxial (+)
RI values:
nα = 1.649(2) nβ = 1.652 nγ = 1.770(4)
2V:
Measured: 20° (5), Calculated: 16°
Max Birefringence:
δ = 0.121
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
Weak r < v
Pleochroism:
Non-pleochroic

Chemistry of Tsepinite-SrHide

Mindat Formula:
Sr(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O
Elements listed:
H, Nb, O, Si, Sr, Ti - search for minerals with similar chemistry
Common Impurities:
Ba,K

Crystallography of Tsepinite-SrHide

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bm
Setting:
Cm
Cell Parameters:
a = 14.490(3) Å, b = 14.23(1) Å, c = 7.881(3) Å
β = 117.28°
Ratio:
a:b:c = 1.018 : 1 : 0.554
Unit Cell V:
1,444.27 ų (Calculated from Unit Cell)
Morphology:
Elongated on [010]. Their prism zone is formed mainly by faces {100} and {001}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.10 Å(90)
6.45 Å(50)
5.01 Å(40)
3.230 Å(100)
3.135 Å(80)
2.510 Å(80)
1.728 Å(50)
1.570 Å(45)
Comments:
From type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of Tsepinite-SrHide

Type Locality:
ⓘ Pegmatite, Astrophyllite Stream, Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
General Appearance of Type Material:
Coarse-prismatic, usually split crystals up to 0.2x0.4x2 mm in size. Sometimes as crusts up to 4x5x0.3 mm on the surface of vuoriyarvite pseudomorphs after vuonnemite. Not well terminated.
Place of Conservation of Type Material:
A. E. Fersman Mineralogical Museum RAS, Moscow, Russia, registration number 3169/1.
Geological Setting of Type Material:
Pegmatite in nepheline syenite
Reference:
Pekov, I. V., Chukanov, N. V., Zadov, A. E., Rozenberg, K. A., Rastsvetaeva, R. K. (2005) Tsepinite-Sr, (Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2·3H2O, a new mineral of the labunstovite group. New Data on Minerals, 40. 11-16

Synonyms of Tsepinite-SrHide

Other Language Names for Tsepinite-SrHide

Simplified Chinese:水硅铌钛锶石
Traditional Chinese:水矽鈮鈦鍶石

Relationship of Tsepinite-Sr to other SpeciesHide

Member of:
Vuoriyarvite Group > Labuntsovite Supergroup
Other Members of Vuoriyarvite Group:
Tsepinite-Ca(Ca,K,Na)2-x(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2OMon. 2/m : B2/m
Tsepinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
Tsepinite-NaNa2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
Vuoriyarvite-KK2(Nb,Ti)2(Si4O12)(O,OH)2 · 4H2OMon. m : Bm

Related Minerals - Strunz-mindat GroupingHide

9.CE.Dutkevichite-(Ce)NaZnBa2Ce2Ti2Si8O26F · H2OOrth. mm2 : Ama2
9.CE.NiobobaotiteBa4(Ti2.5Fe2+1.5)Nb4Si4O28ClTet. 4/m : I41/a
9.CE.AmaterasuiteSr4Ti6Si4O23(OH)ClOrth. mmm (2/m 2/m 2/m) : Fddd
9.CE.SteiningeriteBa2Zr2(Si4O12)O2Tet. 4/mmm (4/m 2/m 2/m) : P4/mbm
9.CE.05PapagoiteCaCu[H3AlSi2O9]Mon. 2/m : B2/m
9.CE.10VerplanckiteBa4Mn2+2Si4O12(OH,H2O)3Cl3Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.CE.15BaotiteBa4(Ti,Nb,W)8O16(SiO3)4ClTet. 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. mmm (2/m 2/m 2/m)
9.CE.25Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2OOrth.
9.CE.25Byelorussite-(Ce)NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2OOrth. mm2 : Ama2
9.CE.25Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2OMon. 2 : B2
9.CE.25Orthojoaquinite-(La)NaBa2La2Fe2+Ti2[Si4O12]2O2(O,OH) · H2OOrth. mmm (2/m 2/m 2/m)
9.CE.25StrontiojoaquiniteSr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2OMon.
9.CE.25Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2OOrth.
9.CE.25Strontio-orthojoaquinite(Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2OOrth.
9.CE.30eLabuntsovite-MnNa4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10-12H2OMon. 2/m : B2/m
9.CE.30bTsepinite-NaNa2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
9.CE.30cGjerdingenite-NaK2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2OMon. 2/m : B2/m
9.CE.30hAlsakharovite-ZnNaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2OMon. m : Bm
9.CE.30cBurovaite-Ca(Na,K)4Ca2(Ti,Nb)8(Si4O12)4(OH,O)8 · 12H2OMon. 2/m : B2/m
9.CE.30aNenadkevichite(Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pbam
9.CE.30cGjerdingenite-MnK2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
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.30dLemmleinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2OOrth.
9.CE.30cKarupmøllerite-Ca(Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2OMon. 2/m : B2/m
9.CE.30cLepkhenelmite-Zn(Ba,K)2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2OMon. m : Bm
9.CE.30hGutkovaite-MnK2CaMn(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2OMon. m : Bm
9.CE.30eLabuntsovite-MgNa4K4(Ba,K)2Mg(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2OMon. 2/m : B2/m
9.CE.30eLabuntsovite-FeNa4K4(Ba,K)2Fe2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2OMon. 2/m : B2/m
9.CE.30cKuzmenkoite-ZnK2Zn(Ti,Nb)4(Si4O12)2(OH,O)4 · 6-8H2OMon. m : Bm
9.CE.30fParalabuntsovite-MgNa8K8Mg4Ti16(Si4O12)8(OH,O)16 · 20-24H2OMon. 2/m : B2/m
9.CE.30dLemmleinite-BaNa2K2Ba(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2OMon. 2/m : B2/m
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 · 6H2OMon. 2/m : B2/m
9.CE.30bVuoriyarvite-KK2(Nb,Ti)2(Si4O12)(O,OH)2 · 4H2OMon. m : Bm
9.CE.30cGjerdingenite-FeK2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30aUnnamed (Ca-Na-ordered analogue of Korobitsynite)(Ca,Na)2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2OOrth. 2 2 2 : P21 21 2
9.CE.30gParakuzmenkoite-Fe(K,Ba)4Fe(Ti,Nb)8(Si4O12)4(O,OH)8 · 14H2OMon. 2/m : B2/m
9.CE.30aKorobitsynite(Na,◻)4Ti2(Si4O12)(O,OH)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbam
9.CE.30cKuzmenkoite-MnK2Mn2+(Ti,Nb)4(Si4O12)2(OH,O)4 · 5-6H2OMon. 2/m : B2/m
9.CE.30bTsepinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
9.CE.30bParatsepinite-BaBa4(Ti,Nb)8(Si4O12)4(OH,O)8 · 8H2OMon. 2/m : B2/m
9.CE.30hNeskevaaraite-FeK3Na2Fe2+(Ti,Nb)4(Si4O12)2(O,OH)4 · 5-6 H2OMon. m : Bm
9.CE.30cGjerdingenite-CaK2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30bTsepinite-Ca(Ca,K,Na)2-x(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2OMon. 2/m : B2/m
9.CE.45Natrokomarovite(Na,Ca,H)2Nb2Si2O10(OH,F)2 · H2OOrth.
9.CE.45Komarovite(Ca,Mn)(Nb,Ti)2[Si2O7](O,F)3 · 3.5H2OOrth. mmm (2/m 2/m 2/m) : Cmmm

Fluorescence of Tsepinite-SrHide

In UV light:
Not 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.

Internet Links for Tsepinite-SrHide

References for Tsepinite-SrHide

Localities for Tsepinite-SrHide

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 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.
Russia
 
  • Murmansk Oblast
    • Khibiny Massif
        • Astrophyllite Stream
Pekov et al. (2005)
Pekov et al. (2005)
    • Lovozersky District
      • Seidozero Lake
        • Lepkhe-Nel'm Mt
Pekov et al. (2005)
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