Bismuth tungstate

Structural formula
General
Surname	Bismuth tungstate
other names	Bismuth tungstate; Bismuth tungsten oxide;
Molecular formula	Bi 2 (WO 4 ) 3
Brief description	odorless yellowish solid
External identifiers / databases
EC number	237-033-7
ECHA InfoCard	100.033.652
PubChem	22234745
Wikidata	Q24576516
properties
Molar mass	1161.48 g mol −1
Physical state	firmly
density	8.24 g cm −3
Melting point	832 ° C
solubility	practically insoluble in water
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	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 .

Bismuth tungstate is an inorganic chemical compound from the group of tungstates .

Extraction and presentation

Bismuth tungstate can be obtained by reacting sodium tungstate with bismuth (III) chloride and sodium chloride or by reacting bismuth (III) oxide with tungsten trioxide .

{\ displaystyle \ mathrm {2 \ BiCl_ {3} +3 \ Na_ {2} WO_ {4} \ \ longrightarrow {} \ Bi_ {2} (WO_ {4}) _ {3} \ downarrow +6 \ NaCl} }

{\ displaystyle \ mathrm {Bi_ {2} O_ {3} +3 \ WO_ {3} \ \ longrightarrow {} \ Bi_ {2} (WO_ {4}) _ {3}}}

properties

Bismuth tungstate is an odorless yellowish solid that is practically insoluble in water. The compound occurs in two modifications and has either a gray-green monoclinic or white tetragonal crystal structure . It should be noted that two other bismuth tungstates are known (3 Bi ₂ O ₃ · WO ₃ , melting point 1011 ° C and Bi ₂ O ₃ · WO ₃ , melting point 1064 ° C).

use

Bismuth tungstate is used as a photocatalyst that is effective in visible light.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Data sheet bismuth tungstate from AlfaAesar, accessed on June 14, 2016 ( PDF )(JavaScript required) .
^ Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 ( books.google.com ).
↑ ^a ^b ^c R. J. Meyer: Wolfram . Springer-Verlag, 2013, ISBN 978-3-662-13401-6 ( books.google.com ).
^ GD Rieck: Tungsten and Its Compounds . Elsevier, 2013, ISBN 978-1-4832-2611-8 ( books.google.com ).
↑ Steven L. Suib: New and Future Developments in Catalysis: Catalysis for Remediation and Environmental Concerns . Newnes, 2013, ISBN 978-0-444-53871-0 ( books.google.com ).

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f ^g Data sheet bismuth tungstate from AlfaAesar, accessed on June 14, 2016 ( PDF )(JavaScript required) .

[Dale_L._Perry-2] Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 ( books.google.com ).

[R._J._Meyer-3] R. J. Meyer: Wolfram . Springer-Verlag, 2013, ISBN 978-3-662-13401-6 ( books.google.com ).

[G._D._Rieck-4] GD Rieck: Tungsten and Its Compounds . Elsevier, 2013, ISBN 978-1-4832-2611-8 ( books.google.com ).

[5] Steven L. Suib: New and Future Developments in Catalysis: Catalysis for Remediation and Environmental Concerns . Newnes, 2013, ISBN 978-0-444-53871-0 ( books.google.com ).