Zeravshanite Mineral Data

Zeravshanite Mineral Data

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General Zeravshanite Information

Chemical Formula:

Cs4Na2Zr3(Si18O45)(H2O)2

Composition:

Molecular Weight = 2,087.09 gm

Cesium 24.20 % Cs 25.65 % Cs₂O

Potassium 0.04 % K 0.05 % K₂O

Sodium 2.40 % Na 3.24 % Na₂O

Zirconium 12.06 % Zr 16.30 % ZrO₂

Titanium 0.44 % Ti 0.73 % TiO₂

Iron 0.13 % Fe 0.19 % Fe₂O₃

Silicon 24.22 % Si 51.82 % SiO₂

Tin 0.28 % Sn 0.36 % SnO₂

Hydrogen 0.19 % H 1.73 % H₂O

Oxygen 36.03 % O

______ ______

100.00 % 100.06 % = TOTAL OXIDE

Empirical Formula:

Cs_3.8Na_0.18K_0.02Na₂Zr_2.76Ti_0.19Sn_0.05Fe³⁺_0.05Si₁₈O₄₅·2(H₂O)

Environment:

Found in a pegmatite boulder. New structure type [Si18O45]18-, 5 and 8-member silicate rings in sheet structure.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Glacial moraine of the Dara-i-Pioz clacier, Alai mountain range, Tien-Shan Mountains, Tajikistan. Link to MinDat.org Location Data.

Synonym:

IMA2003-034

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Zeravshanite Crystallography

Axial Ratios:

a:b:c =3.4918:1:3.0447

Cell Dimensions:

a = 26.3511, b = 7.5464, c = 22.9769, Z = 4; beta = 107.237° V = 4,363.88 Den(Calc)= 3.18

Crystal System:

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

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

By Intensity(I/I_o): 3.35(1), 3.14(0.9), 2.62(0.7),2.82(0.5), 3.65(0.5), 6.32(0.5),

Crystal Structure:

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Uvarova Y A , Sokolova E V , Hawthorne F C , Pautov L A , Agakhanov A A , The Canadian Mineralogist , 42 (2004) p.125-134, A novel (Si18O45)18- sheet in the crystal structure of zeravshanite,, Cs4Na2Zr3(Si18O45)(H2O)2

Physical Properties of Zeravshanite

Color:

Colorless.

Diaphaniety:

Transparent

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Zeravshanite

Gladstone-Dale:

CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1872,KC= 0.1888

Optical Data:

Biaxial (-), a=1.585, b=1.598, g=1.603, bire=0.0180

Calculated Properties of Zeravshanite

Electron Density:

r_electron=3.00 gm/cc
note: r_Zeravshanite=3.18 gm/cc.

Fermion Index

Fermion Index = 0.02608
Boson Index = 0.97392

Photoelectric:

PE_Zeravshanite= 116.27 barns/electron
U=PE_Zeravshanite x r_electron= 348.55 barns/cc.

Radioactivity:

GRapi = 0.49 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Zeravshanite - barely detectable

Zeravshanite Classification

Dana Class:

72.3.3.1 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings

(72.3)with 3-, 4-, or 5-membered rings and 8-membered rings

(72.3.3)Dana Group

72.3.3.1 Zeravshanite ! Cs4Na2Zr3(Si18O45)(H2O)2 C 2/c 2/m

Strunz Class:

VIII/G.13-20 VIII - Silicates

VIII/G - Intermediate between chain- and layered silicates

VIII/G.13 - Haradaite - Suzukiite series

VIII/G.13-10 Nafertisite! Na3(Fe,Fe)6(Ti2Si12O34)(O,OH)7·2(H2O) A2/m 2/m

VIII/G.13-20 Zeravshanite Cs4Na2Zr3(Si18O45)(H2O)2 C 2/c 2/m

Other Zeravshanite Information

References:

NAME( CanMin, v 42, p 125)

See Also:

Links to other databases for Zeravshanite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Print or Cut-and-Paste your Zeravshanite Specimen Label here :

Zeravshanite

Cs4Na2Zr3(Si18O45)(H2O)2
Dana No: 72.3.3.1 Strunz No: VIII/G.13-20
Locality:

Notes: