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Yegorovite

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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

Relationship of Yegorovite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.00.IMA2009-082
Ba
 
2
(Ca,Mg)(V
3+
 
,Al)
 
2
(Si
 
4
O
 
10
)(OH,F)
 
2
O(CO
 
3
)
 
2
9.00.20Rinkite
Ti(Na,Ca)
 
3
(Ca,Ce)
 
4
(Si
 
2
O
 
7
)
 
2
OF
 
3

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, 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 Yegorovite

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    • Localities for Yegorovite

    Hide Locality List
    (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 (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.
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