Sodium germanate
Sodium germanate is an inorganic compound with the formula Na2GeO3. It is a colorless solid. Sodium germanate is primarily used for the synthesis of other germanium compounds.
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| Other names
sodium metagermanate disodium germanium trioxide | |
| Identifiers | |
3D model (JSmol) |
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| ECHA InfoCard | 100.031.535 |
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| 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) | |
Refractive index (nD) |
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).
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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
- 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. doi:10.1107/S0567740878005488.
- C. C. Addison, Inorganic Chemistry of the Main-Group Elements, vol 1, 1973, The chemical Society, ISBN 9780851867526
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