Mineralogy Database

Zeravshanite Mineral Data

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General Zeravshanite Information

Help on Chemical  Formula: Chemical Formula: Cs4Na2Zr3(Si18O45)(H2O)2
Help on Composition: Composition: Molecular Weight = 2,118.63 gm
   Cesium     23.84 %  Cs   25.27 % Cs2O
   Potassium   0.04 %  K     0.04 % K2O
   Sodium      2.37 %  Na    3.19 % Na2O
   Zirconium  11.75 %  Zr   15.88 % ZrO2
   Titanium    0.43 %  Ti    0.72 % TiO2
   Iron        0.11 %  Fe    0.15 % Fe2O3
   Silicon    23.86 %  Si   51.05 % SiO2
   Tin         0.22 %  Sn    0.28 % SnO2
   Hydrogen    0.38 %  H     3.40 % H2O
   Oxygen     37.00 %  O
             ______        ______ 
             100.00 %       99.98 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cs3.8Na0.18K0.02Na2Zr2.73Ti0.19Sn0.04Fe3+0.04Si18O452(H2O)2
Help on Environment: Environment: Found in a pegmatite boulder. New structure type [Si18O45]18-, 5 and 8-member silicate rings in sheet structure.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Glacial moraine of the Dara-i-Pioz clacier, Alai mountain range, Tien-Shan Mountains, Tajikistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the type locality (Zeravshan Range).
Help on Synonym: Synonym: IMA2003-034

Zeravshanite Image

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Comments: BSE image of irregular grains of zeravshanite (zerav), sogdianite (sog) and aegirite (aegi).
Location: Dara-i-Pioz, Tadjikistan. Scale: See Image.
© Diederik Visser

Zeravshanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.4918:1:3.0447
Help on Cell Dimensions: Cell Dimensions: a = 26.3511, b = 7.5464, c = 22.9769, Z = 4; beta = 107.237° V = 4,363.88 Den(Calc)= 3.22
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.35(1)(712 ), 3.14(0.9)(224 ), 2.62(0.7)(026 ), 2.82(0.5)(716 ), 3.65(0.5)(006 ), 6.32(0.5)(402 ), 1.865(0.4)(538 ), 1.891(0.

Physical Properties of Zeravshanite

Help on Cleavage: Cleavage: {???} Distinct
Help on Color: Color: Colorless.
Help on Density: Density: 3.09
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Zeravshanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1849,KPDmeas= 0.1927,KC= 0.1912
Ncalc = 1.59 - 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.585, b=1.598, g=1.603, bire=0.0180, 2V(Calc)=62, 2V(Meas)=-63. Dispersion medium, r < v.

Calculated Properties of Zeravshanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Zeravshanite =3.09 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEZeravshanite = 113.84 barns/electron
U=PEZeravshanite x relectron= 332.65 barns/cc.
Help on Radioactivity: Radioactivity:

Zeravshanite Classification

Help on  Dana Class: Dana Class: (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
  (72.03)with 3-, 4-, or 5-membered rings and 8-membered rings
  (72.03.03)Dana Group Zeravshanite! Cs4Na2Zr3(Si18O45)(H2O)2 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.EA.75 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
09.EA.75 Zeravshanite! Cs4Na2Zr3(Si18O45)(H2O)2 C 2/c 2/m

Other Zeravshanite Information

Help on References: References: NAME( CanMin, v 42, p 125) PHYS. PROP.(AmMin, v91, p220) OPTIC PROP.(AmMin, v91, p220)
Help on See Also: See Also: Links to other databases for Zeravshanite :
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: Strunz No: 09.EA.75





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