Bismuth (III) fluoride

Crystal structure
__  Bi 3+      __  F -
Crystal system	orthorhombic
Space group	Pnma (No. 62)
General
Surname	Bismuth (III) fluoride
other names	Bismuth trifluoride
Ratio formula	BiF 3
Brief description	white, odorless solid
External identifiers / databases
CAS number 7787-61-3 EC number 232-124-8 ECHA InfoCard 100.029.204 PubChem 82233 Wikidata Q425248
properties
Molar mass	265 g mol −1
Physical state	firmly
density	5.32 g cm −3
Melting point	727 ° C
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 314 P: 280-305 + 351 + 338-310
MAK	2.5 mg kg −1 as fluoride
Thermodynamic properties
ΔH f 0	−900 kJ mol −1
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Bismuth (III) fluoride is a chemical compound between bismuth and fluorine . It has the chemical molecular formula BiF ₃ and can be used to make bismuth (V) fluoride .

Extraction and presentation

Bismuth (III) fluoride can be synthesized by reacting bismuth (III) oxide with hydrofluoric acid.

${\displaystyle {\ce {Bi2O3 + 6HF -> 2BiF3 + 3H2O}}}$

The reaction with bismuth oxychloride is also successful:

${\displaystyle {\ce {BiOCl + 3HF -> BiF3 + H2O + HCl}}}$

The reaction of bismuth (III) hydroxide with aqueous hydrofluoric acid does not produce pure bismuth (III) fluoride, but oxide fluoride.

properties

Bismuth (III) fluoride is a white, crystalline solid. It has an orthorhombic crystal structure in the space group Pnma (space group no. 62) of the ytterbium (III) fluoride type.

Individual evidence

1. ↑ ^{a b c d e} data sheet bismuth (III) fluoride from AlfaAesar, accessed on February 3, 2010 ( PDF )(JavaScript required) .
2. ↑ ^{a b} Bismuth (III) fluoride data sheet from Sigma-Aldrich , accessed on November 11, 2012 ( PDF ).
3. ^ AF Holleman , N. Wiberg : Inorganische Chemie . 103rd edition. Volume 1: Basics and main group elements. Walter de Gruyter, Berlin / Boston 2016, ISBN 978-3-11-049585-0 , p. 952 (reading sample: Part A - Basics of the chemistry of hydrogen. Google book search ).
4. ↑ ^{a b c} Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 218.