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Zeravshanite

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About ZeravshaniteHide

Formula:
Na2Cs4Zr3[Si18O45]*2H2O
Colour:
Clear
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.


Classification of ZeravshaniteHide

Approved
Approval Year:
2003
9.EA.75

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings

Physical Properties of ZeravshaniteHide

Vitreous
Transparency:
Transparent
Colour:
Clear
Hardness:
Hardness:
VHN50=805 - 880 kg/mm2 - Vickers
Cleavage:
Distinct/Good
In one direction
Density:
3.09(5) g/cm3 (Measured)    3.17 g/cm3 (Calculated)

Optical Data of ZeravshaniteHide

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.
Surface Relief:
Moderate
Dispersion:
Medium v > r

Chemical Properties of ZeravshaniteHide

Formula:
Na2Cs4Zr3[Si18O45]*2H2O
IMA Formula:
Na2Cs4Zr3Si18O45 · 2H2O

Crystallography of ZeravshaniteHide

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)°
Ratio:
a:b:c = 3.492 : 1 : 3.045
Unit Cell V:
4,363.88 ų (Calculated from Unit Cell)
Z:
4

Type Occurrence of ZeravshaniteHide

Synonyms of ZeravshaniteHide

Other Language Names for ZeravshaniteHide

Simplified Chinese:单斜锆铯大隅石
Traditional Chinese:單斜鋯銫大隅石

Related Minerals - Nickel-Strunz GroupingHide

9.EA.05CuprorivaiteCaCuSi4O10Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
9.EA.05GillespiteBaFe2+Si4O10Tet.
9.EA.05EffenbergeriteBaCuSi4O10Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
9.EA.05WesselsiteSrCuSi4O10Tet.
9.EA.10EkaniteCa2ThSi8O20Tet. 4 2 2 : I4 2 2
9.EA.15Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mnc
9.EA.15Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2OTet.
9.EA.15Fluorapophyllite-(Na)NaCa4(Si8O20)F · 8H2OOrth.
9.EA.20MagadiiteNa2Si14O29 · 11H2OMon.
9.EA.25DalyiteK2ZrSi6O15Tric.
9.EA.25DavaniteK2TiSi6O15Tric.
9.EA.30Sazhinite-(Ce)Na2CeSi6O14•6H2O
9.EA.30Sazhinite-(La)Na3La[Si6O15] · 2H2OOrth. mm2 : Pmm2
9.EA.35ArmstrongiteCaZr[Si6O15] · 3H2OMon.
9.EA.40OkeniteCa10Si18O46 · 18H2OTric. 1 : P1
9.EA.45NekoiteCa3Si6O15·7H2OTric. 1 : P1
9.EA.50CavansiteCa(VO)Si4O10 · 4H2OOrth. mmm (2/m 2/m 2/m)
9.EA.55PentagoniteCa(VO)Si4O10 · 4H2OOrth. mm2
9.EA.60PenkvilksiteNa4Ti2Si8O22 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
9.EA.60TumchaiteNa2Zr(Si4O11) · 2H2OMon.
9.EA.65NabesiteNa2BeSi4O10 · 4H2OOrth. 2 2 2 : P21 21 21
9.EA.70Ajoite(K,Na)Cu7AlSi9O24(OH)6 · 3H2OTric.
9.EA.80Bussyite-(Ce)(Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4Mon. 2/m : B2/b
9.EA.85PlumbophyllitePb2Si4O10 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn

Other InformationHide

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

References for ZeravshaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
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.
Locock, A.J., Piilonen, P.C., Ercit, T.S., Rowe, R. (2006) New mineral names. American Mineralogist: 91: 216-224.
Pekov, I.V. (2007) New minerals from former Soviet Union countries, 1998-2006: new minerals approved by the IMA commission on new minerals and mineral names. Mineralogical Almanac: 11: 9-51.

Internet Links for ZeravshaniteHide

Localities for ZeravshaniteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Tajikistan (TL)
 
  • Region of Republican Subordination
    • Tien Shan Mtn
      • Alai Range (Alayskiy)
Canadian Mineralogist 42:107-119 (2004); Agakhanov A.A., Pautov L.A., Karpenko V.Yu., Bekenova G.K., Uvarova Y.A. (2011) Orlovite, KLi2 TiSi4 O11F, a new mineral of the mica group New Mineral Data 46:13-19; Agakhanov, A.A., Pautov, L.A., Sokolova, E., Hawthorne, F.C., Karpenko, V.Yu., Siidra, O.I., Muftakhov, V.A. (2016): Odigitriaite, CsNa5Ca5[Si14B2O38]F2, a new cesium borosilicate mineral from the Darai-Pioz alkaline massif, Tajikistan: Description and crystal structure. Mineralogical Magazine, 80, (in press).
Mineral and/or Locality  
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