Zeravshanite
A valid IMA mineral species
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About Zeravshanite
Formula:
Na2Cs4Zr3[Si18O45]*2H2O
Colour:
Colorless
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
3.09
Crystal System:
Monoclinic
Name:
Named by L.A. Pautov, A.A. Agakhanov, Yu.A. Uvarova, E. Sokolova, and F.C. Hawthorne in 2004 after the Zarafshan Range. The type material was found in moriane of the Dara-i-Pioz glacier at the junction of the Zeravshan, Turkestan, and Alay Ranges in Tajikistan.
This page provides mineralogical data about Zeravshanite.
Unique Identifiers
Mindat ID:
25702
Long-form identifier:
mindat:1:1:25702:0
GUID
(UUID V4):
(UUID V4):
d3e954ec-5726-4481-b261-e16816bb765a
IMA Classification of Zeravshanite
Approved
IMA Formula:
Na2Cs4Zr3Si18O45 · 2H2O
Approval year:
2003
First published:
2004
Classification of Zeravshanite
9.EA.75
9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Zer | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Zeravshanite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
6 on Mohs scale
Hardness:
VHN50=805 - 880 kg/mm2 - Vickers
Cleavage:
Distinct/Good
In one direction
In one direction
Density:
3.09(5) g/cm3 (Measured) 3.17 g/cm3 (Calculated)
Optical Data of Zeravshanite
Type:
Biaxial (-)
RI values:
nα = 1.585(2) nβ = 1.598(2) nγ = 1.603(2)
2V:
Calculated: -63°
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
Medium v > r
Chemistry of Zeravshanite
Mindat Formula:
Na2Cs4Zr3[Si18O45]*2H2O
Crystallography of Zeravshanite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 26.3511(8) Å, b = 7.5464(3) Å, c = 22.9769(8) Å
β = 107.237(1)°
β = 107.237(1)°
Ratio:
a:b:c = 3.492 : 1 : 3.045
Unit Cell V:
4,363.88 ų (Calculated from Unit Cell)
Z:
4
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0005930 | Zeravshanite | Uvarova Y A, Sokolova E V, Hawthorne F C, Pautov L A, Agakhanov A A (2004) A novel (Si18O45)18- sheet in the crystal structure of zeravshanite, Cs4Na2Zr3(Si18O45)(H2O)2 The Canadian Mineralogist 42 125-134 | 2004 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.35 Å | (100) |
3.14 Å | (90) |
2.62 Å | (70) |
6.32 Å | (50) |
3.65 Å | (50) |
2.82 Å | (50) |
3.25 Å | (40) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites |
Type Occurrence of Zeravshanite
General Appearance of Type Material:
Tabular crystals to 0.1 mm.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia.
Associated Minerals at Type Locality:
Reference:
Pautov, L.A., Agakhanov, A.A., Uvarova, Yu.A., Sokolova, E., Hawthorne F.C. (2004) Zeravshanite, Cs4Na2Zr3Si18O45(H2O)2, a new cesium mineral from Dara-i-Pioz massif (Tajikistan). New Data on Minerals: 39: 21-25.
Synonyms of Zeravshanite
Other Language Names for Zeravshanite
Common Associates
Related Minerals - Strunz-mindat Grouping
9.EA. | Bussyite-(Y) | (Y,REE,Ca)3(Na,Ca)6MnSi9Be5(O,OH,F)34 |
9.EA. | Fluorapophyllite-(NH₄) | NH4Ca4(Si8O20)F · 8H2O |
9.EA. | Hydroxymcglassonite-(K) | KSr4Si8O20(OH) · 8H2O |
9.EA.05 | Cuprorivaite | CaCuSi4O10 |
9.EA.05 | Gillespite | BaFe2+Si4O10 |
9.EA.05 | Effenbergerite | BaCuSi4O10 |
9.EA.05 | Wesselsite | SrCuSi4O10 |
9.EA.07 | Fluorapophyllite-(Cs) | CsCa4(Si8O20)F · 8H2O |
9.EA.10 | Ekanite | Ca2ThSi8O20 |
9.EA.15 | Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O |
9.EA.15 | Hydroxyapophyllite-(K) | KCa4(Si8O20)(OH,F) · 8H2O |
9.EA.15 | Fluorapophyllite-(Na) | NaCa4(Si8O20)F · 8H2O |
9.EA.20 | Magadiite | Na2Si14O29 · 11H2O |
9.EA.25 | Dalyite | K2ZrSi6O15 |
9.EA.25 | Davanite | K2TiSi6O15 |
9.EA.30 | Sazhinite-(Ce) | Na2CeSi6O14 · 6H2O |
9.EA.30 | Sazhinite-(La) | Na3La[Si6O15] · 2H2O |
9.EA.35 | Armstrongite | CaZr[Si6O15] · 3H2O |
9.EA.40 | Okenite | Ca10Si18O46 · 18H2O |
9.EA.45 | Nekoite | Ca3Si6O15 · 7H2O |
9.EA.45 | Perettiite-(Y) | Y2Mn4FeSi2B8O24 |
9.EA.45 | Badakhshanite-(Y) | Y2Mn4Al(Si2B7BeO24) |
9.EA.47 | Shlykovite | KCa[Si4O9(OH)] · 3H2O |
9.EA.50 | Cavansite | Ca(VO)Si4O10 · 4H2O |
9.EA.50 | Diegogattaite | Na2CaCu2Si8O20 · H2O |
9.EA.52 | Yangite | PbMnSi3O8 · H2O |
9.EA.55 | Pentagonite | Ca(VO)Si4O10 · 4H2O |
9.EA.60 | Penkvilksite | Na4Ti2Si8O22 · 4H2O |
9.EA.60 | Tumchaite | Na2Zr(Si4O11) · 2H2O |
9.EA.65 | Nabesite | Na2BeSi4O10 · 4H2O |
9.EA.70 | Ajoite | (K,Na)Cu7AlSi9O24(OH)6 · 3H2O |
9.EA.80 | Bussyite-(Ce) | (Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4 |
9.EA.85 | Plumbophyllite | Pb2Si4O10 · H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Zeravshanite
mindat.org URL:
https://www.mindat.org/min-25702.html
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References for Zeravshanite
Reference List:
Pautov, Leonid A., Agakhanov, Atali A., Uvarova, Yulia A., Sokolova, Elena V., Hawthorne, Frank C. (2004) Zeravshanite, Cs4Na2Zr3(Si18O45)(H2O)2, new cesium mineral from Darai-Pioz massif (Tajikistan) New Data on Minerals, 39. Moscow. 21-25
Uvarova, Y. A., Sokolova, E., Hawthorne, F. C., Pautov, L. A., Agakhanov, A. A. (2004) A novel [Si18O45]18- sheet in the crystal structure of zeravshanite, Cs4Na2Zr3[Si18O45](H2O)2. The Canadian Mineralogist, 42 (1) 125-134 doi:10.2113/gscanmin.42.1.125
Pautov, Leonid A., Agakhanov, Atali A., Uvarova, Yulia A., Sokolova, Elena V., Hawthorne, Frank C. (2004) Zeravshanite, Cs4Na2Zr3(Si18O45)(H2O)2, new cesium mineral from Darai-Pioz massif (Tajikistan) New Data on Minerals, 39. Moscow. 21-25
Localities for Zeravshanite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Tajikistan (TL) | |
| Pautov et al. (2004) +1 other reference |
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Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan