Chromium (II) iodide
| Crystal structure | |||||||||||||
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| __ Cr 2+ __ I - | |||||||||||||
| General | |||||||||||||
| Surname | Chromium (II) iodide | ||||||||||||
| other names |
Chromium diiodide |
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| Ratio formula | CrI 2 | ||||||||||||
| Brief description |
brown-red solid |
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| properties | |||||||||||||
| Molar mass | 305.80 g mol −1 | ||||||||||||
| Physical state |
firmly |
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| density |
4.92 g cm −3 |
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| Melting point |
868 ° C |
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| boiling point |
1100–1400 ° C (decomposition) |
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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 . | |||||||||||||
Chromium (II) iodide is an inorganic chemical compound of chromium from the group of iodides .
Extraction and presentation
Chromium (II) iodide can be obtained by reacting chromium with iodine .
properties
Chromium (II) iodide is a solid that is extremely sensitive to air and moisture and is available in the form of brownish-red flakes, with thinner flakes being translucent. It is easily soluble in air-free water. The air-free solution is light blue in color, otherwise it is green. It crystallizes in the orthorhombic crystal system (distorted cadmium (II) iodide type) in the space group Cmcm (space group no. 63) .
Individual evidence
- ↑ a b c d e Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1481.
- ↑ a b c d Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 398 ( 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.
- ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 1453.