Ytterbium (III) bromide
Crystal structure | ||||||||||||||||
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__ Yb 3+ __ Br - | ||||||||||||||||
General | ||||||||||||||||
Surname | Ytterbium (III) bromide | |||||||||||||||
other names |
Ytterbium tribromide |
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Ratio formula | YbBr 3 | |||||||||||||||
Brief description |
colorless crystals |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 412.75 g mol −1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
956 ° 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 . |
Ytterbium (III) bromide (YbBr 3 ) is a chemical compound made up of the elements ytterbium and bromine . It forms colorless crystals.
Extraction and presentation
A preparation of anhydrous ytterbium (III) bromide by heating the hexahydrate in an HBr stream does not succeed and leads to the formation of basic salts. However, it is possible from a mixture of the hexahydrate with ammonium bromide (NH 4 Br) in a high vacuum with increasing temperature. At 350 ° C the substance is anhydrous.
Properties and use
Ytterbium belongs to the lanthanoids and has the electron configuration [Xe] 4f 14 6s 2 . In its compounds it occurs preferentially in the oxidation state +3 and less often in the oxidation state +2.
The thermal degradation of ytterbium (III) bromide results in ytterbium (II) bromide :
Individual evidence
- ↑ a b c David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-99.
- ↑ a b Data sheet Ytterbium (III) bromide, anhydrous, powder, 99.9% trace metals basis from Sigma-Aldrich , accessed on May 12, 2012 ( PDF ).
- ↑ a b G. Jantsch, N. Skalla, H. Jawurek: “To the knowledge of the halides of the rare earths. V. - About the halides of ytterbium ”, in: Journal for inorganic and general chemistry , 1931 , 201 , pp. 207–220; doi : 10.1002 / zaac.19312010119 .