Sodium germanate
| Crystal structure | |||||||||||||||||||
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| __ Na + __ Si 4+ __ O 2− | |||||||||||||||||||
| Crystal system |
orthorhombic |
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| Space group |
Cmc 2 1 (No. 36) |
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| Lattice parameters |
a = 1085 pm, b = 622.5 pm, c = 493.0 pm |
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| General | |||||||||||||||||||
| Surname | Sodium germanate | ||||||||||||||||||
| other names |
Sodium metagermanate |
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| Ratio formula | Na 2 GeO 3 | ||||||||||||||||||
| Brief description |
white solid |
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| properties | |||||||||||||||||||
| Molar mass | 166.62 g mol −1 | ||||||||||||||||||
| Physical state |
firmly |
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| density |
3.31 g cm −3 |
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| Melting point |
1083 ° C |
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| safety instructions | |||||||||||||||||||
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | |||||||||||||||||||
Sodium germanate is an inorganic chemical compound of sodium from the group of germanates .
Extraction and presentation
Sodium germanate can be obtained by reacting germanium with sodium hydroxide or by reacting sodium carbonate with germanium dioxide at 1200 ° C.
properties
Sodium germanate is a white solid that is soluble in water. The heptahydrate begins to lose its crystal water at 83 ° C. It has an orthorhombic crystal structure with the space group Cmc 2 1 (space group no. 36) isotype to sodium metasilicate .
Individual evidence
- ↑ a b c H. Völlenkle, A. Wittmann, H. Nowotny: Refinement of the crystal structure of sodium metagermanate, Na2GeO3. In: Monthly magazine for chemistry. 102, 1971, p. 964, doi : 10.1007 / BF00909922 .
- ↑ a b c d Dale L. Perry: Handbook of Inorganic Compounds . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 487 ( limited preview in Google Book search).
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ^ Cyril Parsons, Clare Dover: The Elements and their Order: Foundations of Inorganic Chemistry . 1966, p. 89 ( limited preview in Google Book search).
- ↑ R. Blachnik: Pocket book for chemists and physicists Volume 3: Elements, inorganic compounds and materials, minerals . Springer-Verlag, 2013, ISBN 978-3-642-58842-6 , pp. 610 ( limited preview in Google Book Search).