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Yegorovite

Formula:
Na
 
4
[Si
 
4
O
 
8
(OH)
 
4
]·7H
 
2
O
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 Yegorovite

IMA status:Approved 2008
Nickel-Strunz 10th (pending) edition ID:9.00.

9 : SILICATES (Germanates)
0 :
0 :
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Type Occurrence of Yegorovite

Type Locality:Palitra pegmatite (Palette pegmatite), Kedykverpakhk Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
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:
RevditeMegacyclite

Crystallography of Yegorovite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
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 Volume:V 1764.29 ų
Z:4

Chemical Properties of Yegorovite

Formula:
Na
 
4
[Si
 
4
O
 
8
(OH)
 
4
]·7H
 
2
O
Essential elements:H, Na, O, Si
All elements listed in formula:H, Na, O, Si

Other Names for Yegorovite

Synonyms:
IMA2008-033
Other Languages:

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 Yegorovite

Reference List: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(5),814-818(2009)

Internet Links for Yegorovite

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    Localities for Yegorovite

    (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.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Lovozero Massif
            • Kedykverpakhk Mt
    		Doklady Earth Sciences 427(5),814-818(2009)
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 2nd Nov 2009 10:41:51