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Zeravshanite

Collectors Summary

Color farblos
Lustre Glasglanz
Hardness (Mohs) 6.25
Crystal System monoklin, C2/c

Chemism

Chemical formula

Cs4Na2Zr3(Si18O45)(H2O)2

Additional chem. information

Schichtsilikat (Phyllosilikat)

Chemical composition

Cäsium, Natrium, Silicium, Zirconium, Sauerstoff, Wasserstoff

Unit weight: 2112.8184864 u; Number of atoms in the formula: 78

Info

Empirical formula:

Cs4Na2Zr3(Si18O45)(H2O)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.19

4

5.13

1.0079470

4.0317880
Oxygen

O

35.59

47

60.26

15.9994300

751.9732100
Sodium

Na

2.18

2

2.56

22.9897702

45.9795404
Silicon

Si

23.93

18

23.08

28.0855300

505.5395400
Zirconium

Zr

12.95

3

3.85

91.2242000

273.6726000
Caesium

Cs

25.16

4

5.13

132.9054520

531.6218080

Analysis wt%

SiO2 : 52.76, ZrO2 : 16.64, Na2O : 3.32, Cs2O : 26.19, H2O : 1.76 (Ref: Canadian Mineralogist 2004)

Strunz 9th edition incl. updates

9.EA.75

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
A: Einfache Tetraedernetze mit 4-, 5-, (6-), und 8 beteiligten Ringen
75:Zeravshanit-Gruppe

Lapis Classification

VIII/G.13-020

VIII: SILIKATE
G: Übergangsstrukturen zwischen Ketten- und Schichtsilikaten

Classification by Hölzel

9.DM.440

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
M: ~[Si3O9]6--...3-Chain, ~[Si6O15]6-
4: Okenite-Group

Dana 8th edition

72.03.03.01

72: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
03: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings

IMA status

anerkannt 2003

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.021
Birefringence chart\! Zeravshanite title=Birefringence chart Zeravshanite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.582

RI value β

1.598

RI value γ / ε

1.603

Ri mean

1.594

2V angle

Biaxial (-) 63°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell parameters a (Å)

26.351

Cell parameters b (Å)

7.546

Cell parameters c (Å)

22.977

Cell parameters a/b or c/a

3.492

Cell parameters c/b

3.045

Cell parameters α

90°

Cell parameters β

107.23

Cell parameters γ

90°

Z

4

Volume (ų)

4363.819

X-Ray Powder Diffraction

6.32(50), 3.65(50), 3.35(100), 3.14(90), 2.82(50), 2.62(70)
XRD chart Zeravshanite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6.25

VHN (Hardness Vickers)

838 (50g)

Density (g/cm³)

3.09 (gemessen)

3.216 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)

Preface

Rareness

Extremely rare

Author (Name, Year)

Pautov & Agakhanov & Uvarova & Sokolova & Hawthorne, 2004

References

New Data on Minerals 39 (2004), 21

Other languages

German

Zeravshanit

Spanish

Zeravshanita

English

Zeravshanite

French

Zeravshanite

Russian

Зеравшанит

Simplified Chinese

单斜锆铯大隅石

Traditional Chinese

單斜鋯銫大隅石

CNMNC (IMA)-Number

IMA 2003-034

CNMNC symbol

Symbol

Zer

Locations with GPS information

IDs

GUSID (Global unique identifier short form) hnw901zxzk6i_ttFTl-1yw
GUID (Global unique identifier) D33D7C86-F15C-4ECE-A2FE-DB454E5FB5CB
Database ID 4479