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Paratsepinite-Ba Mineral Data

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General Paratsepinite-Ba Information

Help on Chemical  Formula: Chemical Formula: (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 628.25 gm
   Potassium   1.43 %  K     1.72 % K2O
   Barium     10.06 %  Ba   11.23 % BaO
   Sodium      1.35 %  Na    1.83 % Na2O
   Strontium   1.67 %  Sr    1.98 % SrO
   Titanium   10.75 %  Ti   17.93 % TiO2
   Manganese   0.96 %  Mn    1.24 % MnO
   Niobium     8.13 %  Nb   11.64 % Nb2O5
   Silicon    18.33 %  Si   39.21 % SiO2
   Hydrogen    1.45 %  H    12.96 % H2O
   Oxygen     45.87 %  O
             ______        ______ 
             100.00 %       99.73 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba0.46Na0.37K0.23Sr0.12Mn2+0.11Ti1.41Nb0.55Si4.1O12.39(OH)1.8O0.2�3.62(H2O)
Help on Environment: Environment: Hydrothermal mineral in an alkaline pegmatite. Labuntsovite group; structure determined.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Lepkhe-Nelm Mountain, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the relationship to tsepinite-Na.
Help on Synonym: Synonym: IMA2002-006

Paratsepinite-Ba Image

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Comments: Prismatic crystal aggregate of paratsepinite-Ba in pink eudialyte and dark brown acicular astrophyllite.
Location: Lepkhe-Nel'm Mt., Seidozero Lake, Lovozero Massif, Kola Peninsula, Russia. Scale: Picture Size 6 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Paratsepinite-Ba Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0392:1:1.1214
Help on Cell Dimensions: Cell Dimensions: a = 14.551, b = 14.001, c = 15.702, Z = 8; beta = 117.58° V = 2,835.43 Den(Calc)= 2.94
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.95(1)(202,204), 7.11(1)(020), 1.914(0.9)(208),3.24(0.9)(400,404), 2.403(0.8)(602), 3.11(0.8)(042,024), 4.08(0.8)(310),

Physical Properties of Paratsepinite-Ba

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown.
Help on Density: Density: 2.88
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Paratsepinite-Ba

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2393,KPDmeas= 0.2443,KC= 0.2538
Ncalc = 1.73 - 1.75
Help on Optical Data: Optical Data: Biaxial (+), a=1.667, b=1.674, g=1.77, bire=0.1030, 2V(Calc)=32, 2V(Meas)=30. Dispersion dispersion not observed.

Calculated Properties of Paratsepinite-Ba

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.80 gm/cc
note: Specific Gravity of Paratsepinite-Ba =2.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEParatsepinite-Ba = 58.01 barns/electron
U=PEParatsepinite-Ba x relectron= 162.52 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 20.11 (Gamma Ray American Petroleum Institute Units)
Concentration of Paratsepinite-Ba per GRapi unit = 4.97 (%)

Estimated Radioactivity from Paratsepinite-Ba - barely detectable


Paratsepinite-Ba Classification

Help on  Dana Class: Dana Class: 60.01.03b.05 (60)Cyclosilicate Four-Membered Rings
  (60.01)as Titanosilicates
  (60.01.03b)Labuntsovite Group (Vuoriyarvite subgroup Monoclinic [Cm])
60.01.03b.01 Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2•4(H2O) Cm m
60.01.03b.02 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2•3(H2O) Cm m
60.01.03b.03 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2•3(H2O) Cm m
60.01.03b.04 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2•4(H2O) C 2/m 2/m
60.01.03b.05 Paratsepinite-Ba! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2•4(H2O) C 2/m 2/m
60.01.03b.06 Tsepinite-Sr! (Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2•3(H2O) Cm m
Help on  Strunz Class: Strunz Class: 09.CE.30i 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),
09.CE.30i Paratsepinite-Na! (Na,Sr,K,Ca)7(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O)n~8 C 2/m 2/m
09.CE.30i Paratsepinite-Ba! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2•4(H2O) C 2/m 2/m

Other Paratsepinite-Ba Information

Help on References: References: NAME( CanMin, v 42, p 234) PHYS. PROP.(CanMin, v 42, p 234) OPTIC PROP.(CanMin, v 42, p 234)
Help on See Also: See Also: Links to other databases for Paratsepinite-Ba :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: 60.01.03b.05 Strunz No: 09.CE.30i





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