Lanthanum bromide
Crystal structure | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
__ La 3+ __ Br - | ||||||||||||||||
Crystal system | ||||||||||||||||
Space group |
P 6 3 / m (No. 176) |
|||||||||||||||
Coordination numbers |
La [9], Br [3] |
|||||||||||||||
General | ||||||||||||||||
Surname | Lanthanum bromide | |||||||||||||||
other names |
|
|||||||||||||||
Ratio formula | LaBr 3 | |||||||||||||||
Brief description |
white hexagonal crystals, hygroscopic |
|||||||||||||||
External identifiers / databases | ||||||||||||||||
|
||||||||||||||||
properties | ||||||||||||||||
Molar mass | 378.62 g mol −1 | |||||||||||||||
Physical state |
firmly |
|||||||||||||||
density |
5.1 g cm −3 (20 ° C) |
|||||||||||||||
Melting point |
788 ° C |
|||||||||||||||
solubility |
soluble in water |
|||||||||||||||
safety instructions | ||||||||||||||||
|
||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Lanthanum bromide (LaBr 3 ) is the salt of the rare earth metal lanthanum with hydrogen bromide . It crystallizes hexagonally ( space group P 6 3 / m (space group no. 176) , a = 797.13 pm , c = 452.16 pm) and forms colorless crystals that are hygroscopic .
Individual evidence
- ↑ a b c d 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. 4-69.
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ↑ K. Krämer, T. Schleid, M. Schulze, W. Urland, G. Meyer: Three bromides of lanthanum: LaBr 2 , La 2 Br 5 and LaBr 3 . In: Zeitschrift für Anorganische und Allgemeine Chemie , 1989 , 575 , pp. 61-70 doi : 10.1002 / zaac.19895750109 .