Yegorovite Mineral Data

General Yegorovite Information

Chemical Formula:

Na4[Si2O4(OH)2]2•7H2O

Composition:

Molecular Weight = 526.43 gm

Sodium 17.47 % Na 23.55 % Na₂O

Silicon 21.34 % Si 45.65 % SiO₂

Hydrogen 3.45 % H 30.80 % H₂O

Oxygen 57.75 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₄•7(H₂O)2(Si₂O₄)2(OH)₂

Environment:

New structure type

IMA Status:

Proposed IMA 2008 (Dana # Added)

Locality:

Palitra ("Palette") pegmatite, Kedykverpakhk area of the Karnasurt underground loparite mine, Kedykverpakhk Mountain, Lovozero alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Yuriy Klavdievich Yegorov-Tismeno (1938-2007), Russian crystal chemist.

Synonym:

IMA2008-033

Yegorovite Crystallography

Axial Ratios:

a:b:c =0.7964:1:1.2015

Cell Dimensions:

a = 9.8744, b = 12.3981, c = 14.8973, Z = 6; beta = 104.675° V = 1,764.29 Den(Calc)= 2.97

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.116(1), 6.21(0.72), 7.21(0.7),4.003(0.49), 3.734(0.46), 4.696(0.44), 2.463(0.38), 2.359(0.3),

Optical Properties of Yegorovite

Optical Data:

NCalc= 1.73 - from Gladstone-Dale relationship (KC = 0.2444) where Ncalc=Dcalc*KC+1

Calculated Properties of Yegorovite

Electron Density:

Bulk Density (Electron Density)=3.05 gm/cc
note: Specific Gravity of Yegorovite =2.97 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Yegorovite= 1.17 barns/electron
U=PE_Yegorovite x rElectron Density= 3.57 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yegorovite is Not Radioactive

Yegorovite Classification

Dana Class:

65.01.09.01 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.01)with chains P=2

(65.01.09)Dana Group

65.01.09.01 Yegorovite! Na4[Si2O4(OH)2]2•7H2O P 2₁/c 2/m

Strunz Class:

09.DX.00 09 - SILICATES (Germanates)

09.D - Unclassified Strunz Inosilicates

09.DX -Unknown

09.DX.00 Hypersthene? (Mg,Fe)2Si2O6 2/m 2/m 2/m

09.DX.00 Plumalsite* Pb4Al2(SiO3)7(?) Unk Ortho

09.DX.00 IMA2008-070 NaLi2(Fe2Al2Li)(Si6Al2)O22F2 C 2/m 2/m

09.DX.00 IMA2007-015 K(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m

09.DX.00 Tanohataite! LiMn2Si3O8(OH) P1 1

09.DX.00 Punkaruaivite! Li{Ti2(OH)2[Si4O11(OH)]}•H2O C 2/c 2/m

09.DX.00 Yegorovite! Na4[Si2O4(OH)2]2•7H2O P 2₁/c 2/m

09.DX.00 Kushiroite CaAl2SiO6 C 2/c 2/m

09.DX.00 Grossmanite CaTiAlSiO6 C 2/m 2/m

09.DX.00 IMA2009-009 KNa2Li(Mg,Fe)2Ti2Si8O24 C 2/m 2/m

09.DX.00 IMA2009-010 [Ba6(PO4)2(CO3)][Fe7(OH)4Fe2O2(SiO3)8] P1 1

09.DX.00 IMA2009-012 NaNa2(Mg2Al2Li)Si8O22F2 C 2/m 2/m

Other Yegorovite Information

See Also:

Links to other databases for Yegorovite :
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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Print or Cut-and-Paste your Yegorovite Specimen Label here :

Yegorovite

Na4[Si2O4(OH)2]2•7H2O
Dana No: 65.01.09.01 Strunz No: 09.DX.00
Locality:

Notes:

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