Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Zeravshanite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Darai-Pioz (Dara-i-Pioz; Dara-Pioz) Glacier, Alai (Alayskiy) Range, Tien Shan Mts, Region of Republican Subordination, Tajikistan
© 2008, JGW




Formula:
Na
 
2
Cs
 
4
Zr
 
3
[Si
 
18
O
 
45
]*2H
 
2
O
System:MonoclinicColour:Clear
Hardness:6
Name:For the type locality.
This page provides mineralogical data about Zeravshanite.

Classification of Zeravshanite

IMA status:Approved 2003
Nickel-Strunz 10th (pending) edition ID:9.EA.75

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
mindat.org URL:http://www.mindat.org/min-25702.html
Please feel free to link to this page.

Type Occurrence of Zeravshanite

Type Locality:Darai-Pioz (Dara-i-Pioz; Dara-Pioz) Glacier, Alai (Alayskiy) Range, Tien Shan Mts, Region of Republican Subordination, Tajikistan

Physical Properties of Zeravshanite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Clear
Hardness (Mohs):6
Hardness (Vickers):VHN50=805 - 880 kg/mm2
Cleavage:Distinct/Good
In one direction
Density (measured):3.09(5) g/cm3
Density (calculated):3.17 g/cm3

Crystallography of Zeravshanite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
Space Group Setting:C2/c
Cell Parameters:a = 26.3511(8) Å, b = 7.5464(3) Å, c = 22.9769(8) Å
β = 107.237(1)°
Ratio:a:b:c = 3.492 : 1 : 3.045
Unit Cell Volume:V 4,363.88 ų (Calculated from Unit Cell)
Z:4

Optical Data of Zeravshanite

Type:Biaxial (-)
RI values: nα = 1.585(2) nβ = 1.598(2) nγ = 1.603(2)
2V:Calculated: -63°
Maximum Birefringence:δ = 0.018

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:Medium v > r

Chemical Properties of Zeravshanite

Formula:
Na
 
2
Cs
 
4
Zr
 
3
[Si
 
18
O
 
45
]*2H
 
2
O
Essential elements:Cs, H, Na, O, Si, Zr
All elements listed in formula:Cs, H, Na, O, Si, Zr

Relationship of Zeravshanite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EA.05Cuprorivaite
CaCu[Si
 
4
O
 
10
]
9.EA.05Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
9.EA.05Effenbergerite
BaCu[Si
 
4
O
 
10
]
9.EA.05Wesselsite
SrCu[Si
 
4
O
 
10
]
9.EA.10Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.EA.15Apophyllite-(KF)
KCa
 
4
(Si
 
8
O
 
20
)(F,OH) · 8H
 
2
O
9.EA.15Apophyllite-(KOH)
KCa
 
4
(Si
 
8
O
 
20
)(OH,F) · 8H
 
2
O
9.EA.15Apophyllite-(NaF)
NaCa
 
4
(Si
 
8
O
 
20
)F · 8H
 
2
O
9.EA.20Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
 · 3H
 
2
O
9.EA.25Dalyite
K
 
2
ZrSi
 
6
O
 
15
9.EA.25Davanite
K
 
2
TiSi
 
6
O
 
15
9.EA.30Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
9.EA.30Sazhinite-(La)
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
9.EA.35Armstrongite
CaZr[Si
 
6
O
 
15
] · 3H
 
2
O
9.EA.40Okenite
CaSi
 
2
O
 
5
 · 2H
 
2
O
9.EA.45Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
9.EA.50Cavansite
Ca(VO)Si
 
4
O
 
10
 · 4H
 
2
O
9.EA.55Pentagonite
Ca(VO)Si
 
4
O
 
10
 · 4H
 
2
O
9.EA.60Penkvilksite
Na
 
4
Ti
 
2
Si
 
8
O
 
22
 · 4H
 
2
O
9.EA.60Tumchaite
Na
 
2
Zr(Si
 
4
O
 
11
) · 2H
 
2
O
9.EA.65Nabesite
Na
 
2
BeSi
 
4
O
 
10
 * 4 H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
AlSi
 
9
O
 
24
(OH)
 
6
 · 3H
 
2
O
9.EA.80Bussyite-(Ce)
(Ce,REE)
 
3
(Na,H
 
2
O)
 
6
MnSi
 
9
Be
 
5
(O,OH)
 
30
F
 
4
9.EA.85Plumbophyllite
Pb
 
2
Si
 
4
O
 
10
 · H
 
2
O

Other Names for Zeravshanite

Synonyms:
IMA2003-034
Other Languages:
German:Zeravshanit
Russian:Зеравшанит

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Zeravshanite

Reference List:

- +
Pautov L.A., Agakhanov A.A., Uvarova Yu.A., Sokolova E., Hawthorne F.C. (2004): Zearvshanite, Cs4Na2Zr3Si18O45(H2O)2, new cesium mineral from Dara-i-Pioz massif (Tajikistan). New Data on Minerals, 39, 21-25.

Uvarova, Yu.A., Sokolova, E., Hawthorne, F.C., Pautov, L.A., Agakhanov, A.A. (2004): A novel [Si8O45]18- sheet in the crystal structure of zeravshanite, Cs4Na2Zr3[Si18O45](H2O)2. Canadian Mineralogist, 42, 125-134.

Internet Links for Zeravshanite

Search Engines:
  • Look for Zeravshanite on Google
  • Look for Zeravshanite images on Google
    • External Links:
  • Look for Zeravshanite on Webmineral
  • Look for Zeravshanite on Athena Mineralogy
  • Look for Zeravshanite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
  • Buy RARE Minerals from Rocks of Africa
  • The Arkenstone - Fine Minerals
  • Search for - Zeravshanite - on e-Rocks Mineral Sales & Auctions
  • SpiriferMinerals.com - high quality low prices
  • Find Zeravshanite on www.crystalclassics.co.uk
  • Fine Minerals from Weinrich Minerals, Inc.
  • Wilensky Fine Minerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Pricedownminerals.com - Reverse Auctions and Shop
  • Buy from David K Joyce minerals
  • Fabre Minerals - search for Zeravshanite specimens
  • Search for minerals at Heliodor
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Zeravshanite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mts
        • Alai (Alayskiy) Range
    		CanMin 42:107-119 (2004)
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: 27th Jul 2011 12:23:07
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds