Sodium germanate

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Sodium germanate
Names
Other names
sodium metagermanate
Identifiers
3D model (JSmol)
ECHA InfoCard 100.031.535 Edit this at Wikidata
EC Number
  • 234-703-0
UNII
  • InChI=1S/GeO3.2Na/c2-1(3)4;;/q-2;2*+1
    Key: FNIHDXPFFIOGKL-UHFFFAOYSA-N
  • [O-][Ge](=O)[O-].[Na+].[Na+]
Properties
Na2GeO3
Molar mass 166.62 g/mol
Appearance white solid
Odor odorless
Density 3.31 g/cm3
Melting point 1,060 °C (1,940 °F; 1,330 K)
14.4 g/100 mL (0 °C)
23.8 g/100 mL (25 °C)
1.59
Structure
orthorhombic
Related compounds
Related compounds
 Sodium silicate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Sodium germanate is an inorganic compound with the chemical formula Na2GeO3. It exists as a colorless solid. Sodium germanate is primarily used for the synthesis of other germanium compounds.

Preparation and reactions

Sodium germanate can be prepared by the fusion of germanium oxide with sodium hydroxide at high temperatures:

2 NaOH + GeO2 → Na2GeO3 + H2O

An intermediate in this reaction is the protonated derivative NaHGeO3, which is a water-soluble salt.

Structure

Structure of solid sodium germanate. (color scheme: red = O) Si resides at the center of the blue tetrahedra.

it is structurally analogous to sodium metasilicate, Na2SiO3, consisting of polymeric GeO32− anions made up of vertex sharing {GeO4} tetrahedra.[1][2]

See also

References

  1. ^ Cruickshank, D. W. J.; Kálmán, A.; Stephens, J. S. (1978). "A Reinvestigation of Sodium Metagermanate". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 34 (4): 1333–1334. Bibcode:1978AcCrB..34.1333C. doi:10.1107/S0567740878005488.
  2. ^ C. C. Addison, Inorganic Chemistry of the Main-Group Elements, vol 1, 1973, The chemical Society, ISBN 9780851867526


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