Cerium tungstate

Structural formula
General
Surname	Cerium tungstate
other names	Cerium tungsten oxide; Cerium (III) tungstate;
Molecular formula	Ce 2 (WO 4 ) 3
Brief description	whitish odorless solid
External identifiers / databases
EC number	236-639-9
ECHA InfoCard	100.033.295
PubChem	16213782
Wikidata	Q25387788
properties
Molar mass	1023.78 g mol −1
Physical state	firmly
density	6.77 g cm −3
Melting point	1089 ° C
solubility	practically insoluble in water
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 334-315-319-317-335
	P: 285-261-280-305 + 351 + 338-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

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

Extraction and presentation

Cerium tungstate can be obtained by reacting cerium (III) nitrate with sodium tungstate . It can also be obtained by reacting tungsten (VI) oxide with ceria at temperatures around 1500 ° C.

{\ displaystyle \ mathrm {4 \ CeO_ {2} +6 \ WO_ {3} \ longrightarrow 2 \ Ce_ {2} (WO_ {4}) _ {3} + O_ {2}}}

In the Ce ₂ O ₃ -WO _{3 system} , eight phases with the compositions 3Ce ₂ O ₃ · WO ₃ , 3Ce ₂ O ₃ · 2WO ₃ , α-Ce ₂ O ₃ · WO ₃ , β-Ce ₂ O ₃ · WO ₃ , α-Ce ₂ O ₃ · 2WO ₃ , β-Ce ₂ O ₃ · 2WO ₃ , Ce ₂ O ₃ · 3WO _3, and 2Ce ₂ O ₃ · 9WO ₃ were found. Of these, the high-temperature phases (β) are metastable.

properties

Cerwungstate is a whitish odorless solid that is practically insoluble in water. It has a monoclinic crystal structure that is isotypic to that of europium tungstate with the space group C 2 / c (space group no.15 ) (a = 7.813, b = 11.720, c = 11.586, β = 109.36 °, Z = 4) . Template: room group / 15

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet cerium tungstate from AlfaAesar, accessed on June 16, 2016 ( PDF )(JavaScript required) .
↑ Smritimoy Pramanik, Subhash Chandra Bhattacharya: Size tunable synthesis and characterization of cerium tungstate nanoparticles via H ₂ O / AOT / heptane microemulsion . In: Materials Chemistry and Physics . tape 121 , no. 1–2 , May 15, 2010, pp. 125–130 , doi : 10.1016 / j.matchemphys.2010.01.012 .
↑ ^a ^b T. Gressling, Hk. Müller-Buschbaum: On the crystal structure of Ce ₂ (WO ₄ ) ₃ / On the Crystal Structure of Ce ₂ (WO ₄ ) ₃ . In: Journal of Nature Research B . 50, 1995, pp. 1513-1516 ( PDF , free full text).

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet cerium tungstate from AlfaAesar, accessed on June 16, 2016 ( PDF )(JavaScript required) .

[Smritimoy_Pramanik-2] Smritimoy Pramanik, Subhash Chandra Bhattacharya: Size tunable synthesis and characterization of cerium tungstate nanoparticles via H ₂ O / AOT / heptane microemulsion . In: Materials Chemistry and Physics . tape 121 , no. 1–2 , May 15, 2010, pp. 125–130 , doi : 10.1016 / j.matchemphys.2010.01.012 .

[DOI10.1515/znb-1995-1013-3] T. Gressling, Hk. Müller-Buschbaum: On the crystal structure of Ce ₂ (WO ₄ ) ₃ / On the Crystal Structure of Ce ₂ (WO ₄ ) ₃ . In: Journal of Nature Research B . 50, 1995, pp. 1513-1516 ( PDF , free full text).