Thulium (III) iodide
Crystal structure | ||||||||||||||||
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__ Tm 3+ __ I - | ||||||||||||||||
General | ||||||||||||||||
Surname | Thulium (III) iodide | |||||||||||||||
other names |
Thulium triiodide |
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Ratio formula | TmI 3 | |||||||||||||||
Brief description |
yellow solid |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 549.65 g mol −1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
1015 ° C |
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boiling point |
1260 ° C |
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solubility |
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 . |
Thulium (III) iodide is an inorganic chemical compound of thulium from the group of iodides .
Extraction and presentation
Thulium (III) iodide can be obtained by reacting thulium with iodine .
It is also possible to display it by reacting thulium with mercury (II) iodide in a vacuum at 500 ° C.
Thulium (III) iodide hydrate can be converted to the anhydrate by dehydration with a large excess of ammonium iodide (as the compound is prone to hydrolysis ).
properties
Thulium (III) iodide is a yellow, strongly hygroscopic solid with a crystal structure of the bismuth (III) iodide type. In air, it quickly absorbs moisture and forms hydrates. The corresponding oxide iodide is easily formed at elevated temperatures.
use
Thulium (III) iodide is used as a component in metal halide lamps .
Individual evidence
- ↑ a b c d e f Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1077.
- ↑ a b c d e data sheet Thulium (III) iodide, ultra dry, 99.99% (REO) from AlfaAesar, accessed on April 26, 2014 ( PDF )(JavaScript required) .
- ^ Peter G. Flesch: Light and Light Sources: High-Intensity Discharge Lamps . Springer, 2007, ISBN 3-540-32685-5 , pp. 45 ( limited preview in Google Book search).