Ytterbium (III) bromide

Crystal structure
__ Yb 3+      __ Br -
General
Surname	Ytterbium (III) bromide
other names	Ytterbium tribromide
Ratio formula	YbBr 3
Brief description	colorless crystals
External identifiers / databases
CAS number 13759-89-2 EC number 237-350-0 ECHA InfoCard 100.033.940 PubChem 83708 Wikidata Q424877
properties
Molar mass	412.75 g mol −1
Physical state	firmly
Melting point	956 ° C (decomposition)
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
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 :

${\displaystyle \mathrm {2\ YbBr_{3}\ {\xrightarrow[{}]{\Delta \ T}}\ 2\ YbBr_{2}\ +\ Br_{2}} }$

Individual evidence

1. ↑ ^{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.
2. ↑ ^{a b} Data sheet Ytterbium (III) bromide, anhydrous, powder, 99.9% trace metals basis from Sigma-Aldrich , accessed on May 12, 2012 ( PDF ).
3. ↑ ^{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 .