Manganese (II) iodide
Crystal structure | ||||||||||||||||
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__ Mn 2+ __ I - | ||||||||||||||||
General | ||||||||||||||||
Surname | Manganese (II) iodide | |||||||||||||||
other names |
Manganese diiodide |
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Ratio formula | MnI 2 | |||||||||||||||
Brief description |
pink solid |
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properties | ||||||||||||||||
Molar mass | 308.75 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
5.01 g cm −3 (25 ° C) |
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Melting point |
701 ° C |
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boiling point |
1033 ° C |
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solubility |
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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 . |
Manganese (II) iodide is a chemical compound of manganese from the group of iodides .
Extraction and presentation
Manganese (II) iodide can be obtained by reacting manganese (II) oxide with hydrogen iodide .
The tetrahydrate can be prepared by reacting manganese (II) carbonate with hydriodic acid. The anhydrous form can be produced from it by dehydration in a vacuum .
properties
Manganese (II) iodide is a pink solid that turns brown in air under the influence of light as a result of the oxidation of the iodide ion to iodine. It has a trigonal crystal structure of the cadmium (II) iodide type ( polytype 2H ) with the space group P 3 m 1 (space group no.164) . It dissolves in water and decomposes. The tetrahydrate has a monoclinic crystal structure with the space group P 2 1 / c (No. 14) .
Individual evidence
- ↑ a b c d american elements : Manganese Iodide: AMERICAN ELEMENTS Supplier & Tech Info
- ↑ a b c d Datasheet Manganese (II) iodide, anhydrous, flakes, 99.99% trace metals basis from Sigma-Aldrich , accessed on July 8, 2012 ( PDF ).
- ^ A b c Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . Springer, 1997, ISBN 3-540-60035-3 , pp. 566 ( limited preview in Google Book search).
- ↑ Data sheet Manganese (II) iodide, anhydrous, 98% from AlfaAesar, accessed on July 8, 2012 ( PDF )(JavaScript required) .
- ^ RP Schuman: The radiochemistry of manganese . National Academies of Science, 1971, pp. 18 ( limited preview in Google Book search).
- ^ Thomas Leonard Watson: Geological Survey bulletin . GPO, 1910, pp. 352 ( limited preview in Google Book search).
- ^ RP Schuman: Modern Inorganic Chemistry . Walter de Gruyter, 2007, ISBN 3-11-019060-5 , p. 352 ( limited preview in Google Book search).
- ^ JE Moore, JE Abola, RA Butera: Structure of manganese (II) iodide tetrahydrate, MnI2.4H2O. In: Acta Crystallographica Section C Crystal Structure Communications. 41, pp. 1284-1286, doi : 10.1107 / S0108270185007466 .