Yegorovite Mineral Data (original) (raw)
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
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Images:
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 - PrismaticH-M Symbol (2/m) Space Group: P 21/c
X Ray Diffraction:
By Intensity(I/Io): 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:
PEYegorovite = 1.17 barns/electron
U=PEYegorovite 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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Yegorovite
Na4[Si2O4(OH)2]2•7H2O
Dana No: 65.01.09.01 Strunz No: 09.DX.00
Locality:
Notes: