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Yegorovite

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About YegoroviteHide

Formula:
Na4[Si4O8(OH)4] · 7H2O
Crystal System:
Monoclinic
Name:
Named for crystal chemist Yuriy Klavdievich Yegorov-Tismenko (1938-2007)
The first natural sodium silicate with single zig-zag chains of Si tetrahedra.




Classification of YegoroviteHide

Approved
Approval Year:
2008
9.00.

9 : SILICATES (Germanates)
0 :
0 :

Chemical Properties of YegoroviteHide

Formula:
Na4[Si4O8(OH)4] · 7H2O
IMA Formula:
Na4[Si2O4(OH)2]2 · 7H2O

Crystallography of YegoroviteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 9.8744(4) Å, b = 12.398(5) Å, c = 14.8973(7) Å
β = 104.675(5)°
Ratio:
a:b:c = 0.796 : 1 : 1.202
Unit Cell V:
1764.29 ų
Z:
4

Type Occurrence of YegoroviteHide

General Appearance of Type Material:
Tiny colorless to semi-transparent coarse prismatic to flattened, lamellar crystals up to 1mm long, often associated with minor revdite and megacyclite
Associated Minerals at Type Locality:

Synonyms of YegoroviteHide

Related Minerals - Nickel-Strunz GroupingHide

9.00.Clino-ferri-holmquistite◻{Li2}{Mg3Fe3+2}(Si8O22)(OH)2Mon. 2/m : B2/m
9.00.Shkatulkalita
9.00.AlflarseniteNaCa2Be3Si4O13(OH) · 2H2OMon. 2 : P21
9.00.FerroericssoniteBaFe2+2 Fe3+(Si2O7)O(OH) Mon. 2/m : B2/m
9.00.Ferrisepiolite(Fe3+,Fe2+,Mg)4((Si,Fe3+)6O15)(O,OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m)
9.00.ZvyaginiteNaZnNb2Ti[Si2O7]20(OH,F)3(H2O)4 + (x < 1)Tric. 1 : P1
9.00.BurnettiteCaVAlSiO6Mon. 2/m : B2/b
9.00.MendigiteMn2Mn2MnCa(Si3O9)2Tric. 1 : P1
9.00.20Rinkite-(Ce)(Ca3Ce)Na(NaCa)Ti(Si2O7)2(OF)F2Mon.

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 YegoroviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zubkova, N.V., I.V.Pekov, D.Y.Pushcharovskii, & S.S. Kazantsev (2009): Crystal Structure of Yegorovite Na4[Si4O8(OH)4] · 7H2O. Doklady Earth Sciences 427, 814-818.
I. V. Pekov, N. V. Zubkova, N. V. Chukanov, A. E. Zadov, V. G. Grishin und D. Yu. Pushcharovsky (2010): Yegorovite, Na4[Si4O8(OH)4]•7H2O, a new mineral from the Lovozero alkaline pluton, Kola Peninsula. Geology of Ore Deposits 52, 584-590.

Internet Links for YegoroviteHide

Localities for YegoroviteHide

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.
Russia (TL)
 
  • Northern Region
    • Murmanskaya Oblast'
      • Lovozero Massif
        • Kedykverpakhk Mt
          • Karnasurt mine (Kedyk area)
Doklady Earth Sciences 427 (2009) 814-818; I. V. Pekov, N. V. Zubkova, N. V. Chukanov, A. E. Zadov, V. G. Grishin und D. Yu. Pushcharovsky (2010): Yegorovite, Na4[Si4O8(OH)4]•7H2O, a new mineral from the Lovozero alkaline pluton, Kola Peninsula. Geology of Ore Deposits 52, 584-590.
Mineral and/or Locality  
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