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Sodium germanate

Summary

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.

Sodium germanate
Names
Other names
sodium metagermanate
Identifiers
  • 12025-19-3 checkY
3D model (JSmol)
  • Interactive image
ECHA InfoCard 100.031.535 Edit this at Wikidata
EC Number
  • 234-703-0
  • 13783481
UNII
  • X7C1F92G4R checkY
  • DTXSID5020655 Edit this at Wikidata
  • 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).
Infobox references

Preparation and reactions edit

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 edit

 
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 edit

References edit

  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