Scandium sulfate
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Scandium sulfate | |||||||||||||||
other names |
Discandium trisulfate |
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Molecular formula | Sc 2 (SO 4 ) 3 | |||||||||||||||
Brief description |
colorless solid |
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properties | ||||||||||||||||
Molar mass | 468.18 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
2.579 g cm −3 |
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Melting point |
<600 ° C (decomposition) |
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solubility |
very soluble in water |
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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 . |
Scandium sulfate is an inorganic chemical compound of scandium from the group of sulfates .
Extraction and presentation
Scandium sulfate can be obtained by evaporating a solution of scandium nitrate mixed with sulfuric acid and heating the residue.
properties
Scandium sulfate is a colorless, crystalline solid that is very soluble in water. However, small amounts of sulfuric acid in the water greatly reduce the solubility. It has a trigonal crystal structure with the space group R 3 (space group no.148) . At room temperature, the compound is present as a pentahydrate, which turns into the dihydrate at around 100 ° C. There is also an octahydrate. From about 600 ° C the compound decomposes and up to 850 ° C scandium oxide is formed .
use
Scandium sulfate is used in solution for the germination of seeds.
Individual evidence
- ↑ a b c Entry on Scandium connections. In: Römpp Online . Georg Thieme Verlag, accessed on September 15, 2015.
- ↑ a b c Data sheet Scandium (III) sulfate pentahydrate, 99.9% from Sigma-Aldrich , accessed on September 15, 2015 ( PDF ).
- ↑ a b c 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. 718 ( limited preview in Google Book search).
- ^ Albert Ladenburg: Handwörten der Chemie . E. Trewendt, 1892, OCLC 19423544 , p. 472 ( limited preview in Google Book search).
- ↑ a b F. Wirth: About the sulfate and oxalate of the Scandine earth. In: Journal of Inorganic Chemistry. 87, 1914, p. 9, doi: 10.1002 / zaac.19140870104 .
- ^ Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, ISBN 978-1-4398-1462-8 , pp. 357 ( limited preview in Google Book search).
- ^ CT Horovitz: Scandium Its Occurrence, Chemistry Physics, Metallurgy, Biology and Technology . Elsevier, 2012, ISBN 0-323-14451-9 , pp. 231 ( limited preview in Google Book search).
- ^ John Emsley: Nature's Building Blocks An AZ Guide to the Elements . Oxford University Press, 2001, ISBN 0-19-850340-7 , pp. 376 ( limited preview in Google Book search).