Paratsepinite-Na Mineral Data

General Paratsepinite-Na Information

Chemical Formula:

(Na,Sr,K,Ca)7(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O) n ~ 8

Composition:

Molecular Weight = 2,286.52 gm

Potassium 1.20 % K 1.44 % K₂O

Sodium 4.22 % Na 5.69 % Na₂O

Strontium 8.05 % Sr 9.52 % SrO

Calcium 0.61 % Ca 0.86 % CaO

Titanium 12.56 % Ti 20.96 % TiO₂

Niobium 8.13 % Nb 11.63 % Nb₂O₅

Silicon 19.65 % Si 42.04 % SiO₂

Hydrogen 0.79 % H 7.09 % H₂O

Oxygen 44.78 % O

______ ______

100.00 % 99.23 % = TOTAL OXIDE

Empirical Formula:

7(Na_0.6)7(Sr_0.3)7(K_0.1)7(Ca_0.05)8(Ti_0.75)8(Nb_0.25)4(Si₄)4(O₁₂)O₆(OH)₂·8(H₂O)

Environment:

Labuntsovite group

IMA Status:

Proposed IMA 2003 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2003-008

Paratsepinite-Na Image

Images:

Paratsepinite-Na

Comments: Colorless paratsepinite-Na crystals with associated red-brown labuntsovite.
Location: Mt. Khibinpakhchorr, Chibiny, Kola, Russia. Scale: Picture size 3 x 5 mm.
© Diederik Visser

Paratsepinite-Na Crystallography

Axial Ratios:

a:b:c =1.0243:1:1.1124

Cell Dimensions:

a = 14.596, b = 14.249, c = 15.852, Z = 3; beta = 117.27° V = 2,930.45 Den(Calc)= 3.89

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.09(1), 3.24(0.9), 3.11(0.8),3.15(0.8), 2.491(0.7), 2.54(0.7),

Crystal Structure:

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Organova N I , Krivovichev S V , Shlyukova Z V , Zadov A E , Rozhdestvenskaya I V , Ivanova T I , Crystallography Reports , 49 (2004) p.946-952, Structure of new mineral paratsepinite-Na and its place in the labuntsovite, group, Locality: Khibiny massif, Mt Khibinpakhchorr, Russia

Physical Properties of Paratsepinite-Na

Color:

Colorless.

Diaphaneity:

Transparent

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Paratsepinite-Na

Gladstone-Dale:

CI calc= 0.297 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1789,KC= 0.2543
Ncalc = 1.99

Optical Data:

Biaxial (+), a=1.657, b=1.666, g=1.765, bire=0.1080

Calculated Properties of Paratsepinite-Na

Electron Density:

Bulk Density (Electron Density)=3.79 gm/cc
note: Specific Gravity of Paratsepinite-Na =3.89 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Paratsepinite-Na}= 23.63 barns/electron
U=PE_{Paratsepinite-Na} x r_electron= 89.58 barns/cc.

Radioactivity:

GRapi = 16.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Paratsepinite-Na per GRapi unit = 5.94 (%)

Estimated Radioactivity from Paratsepinite-Na - barely detectable

Paratsepinite-Na Classification

Dana Class:

60.01.03e.04 (60)Cyclosilicate Four-Membered Rings

(60.01)as Titanosilicates

(60.01.03e)Labuntsovite Group (Labuntsovite subgroup Monoclinic [C2/m])

60.01.03e.01 Labuntsovite-Mn! Na4K4(Ba,K)(Mn,Fe)1x(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O),n=10-12 I2/m 2/m

60.01.03e.02 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8•10(H2O) C 2/m 2/m

60.01.03e.03 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8•10(H2O) C 2/m 2/m

60.01.03e.04 Paratsepinite-Na! (Na,Sr,K,Ca)7(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O)n~8 C 2/m 2/m

60.01.03e.05 Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) C 2/m 2/m

60.01.03e.06 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]•4(H2O) C 2/m 2/m

60.01.03e.07 Gjerdingenite-Ca! K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•6H2O C 2/m 2/m

60.01.03e.08 Gjerdingenite-Na! (K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4•5H2O C 2/m 2/m

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-Na Information

See Also:

Links to other databases for Paratsepinite-Na :
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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Print or Cut-and-Paste your Paratsepinite-Na Specimen Label here :

Paratsepinite-Na

(Na,Sr,K,Ca)7(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O) n ~ 8
Dana No: 60.01.03e.04 Strunz No: 09.CE.30i
Locality:

Notes: