Vanadium (II) oxide

Crystal structure
	__ V 2+ __ O 2−
General
Surname	Vanadium (II) oxide
Ratio formula	VO
Brief description	odorless gray solid
External identifiers / databases
EC number	234-834-3
ECHA InfoCard	100,031,655
PubChem	24411
Wikidata	Q1966236
properties
Molar mass	66.94 g mol −1
Physical state	firmly
density	5.76 g cm −3
Melting point	950 ° C (other source 1790 ° C)
boiling point	2627 ° C
solubility	almost insoluble in water
safety instructions
H and P phrases	H: 372-332-319-335
	P: 280-305 + 351 + 338-308 + 313
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Vanadium (II) oxide is an inorganic chemical compound of vanadium from the group of oxides .

Extraction and presentation

Vanadium (II) oxide can be obtained by reacting vanadium (III) oxide with vanadium in a vacuum at temperatures between 1200 and 1600 ° C.

{\ displaystyle \ mathrm {V_ {2} O_ {3} + V \ longrightarrow 3 \ VO}}

properties

Vanadium (II) oxide is an odorless gray powder and has a homogeneity range from VO _0.86 to VO _1.25 . According to various authors, it probably consists of two adjacent phases VO _0.86 to VO _0.91 and VO _1.05 to VO _1.25 . It has a crystal structure of the sodium chloride type (a = 402.7–413.8 pm ), i.e. a cubic crystal structure with the space group Fm 3 m (space group no. 225) . It is soluble in acids, whereby V (H ₂ O) ₆²⁺ ions are formed, which color the solution purple. These solutions act as strong reducing agents, the ions quickly converting to V (H ₂ O) ₆³⁺ ions in air , which is visible when the color of the solution changes to green. Template: room group / 225

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Data sheet Vanadium (II) oxide, 99 +% (metals basis) from AlfaAesar, accessed on June 16, 2013 ( PDF )(JavaScript required) .
↑ WM Haynes, David R. Lide, Thomas J. Bruno: CRC Handbook of Chemistry and Physics 2012-2013 . CRC Press, 2012, ISBN 978-1-4398-8049-4 ( limited preview in Google Book Search).
↑ ^a ^b ^c Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1419.
↑ Periodic table online: Properties of vanadium (II) oxide
↑ Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 790 ( limited preview in Google Book search).
↑ Gurdeep Raj: Advanced Inorganic Chemistry . Vol. 1, 1975, ISBN 81-87224-03-7 , pp. 925 ( limited preview in Google Book Search).

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f ^g Data sheet Vanadium (II) oxide, 99 +% (metals basis) from AlfaAesar, accessed on June 16, 2013 ( PDF )(JavaScript required) .

[W._M._Haynes,_Ph.D.,_David_R._Lide,_Ph.D.,_Thomas_J._Bruno-2] WM Haynes, David R. Lide, Thomas J. Bruno: CRC Handbook of Chemistry and Physics 2012-2013 . CRC Press, 2012, ISBN 978-1-4398-8049-4 ( limited preview in Google Book Search).

[brauer-3] Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1419.

[Das_Periodensystem_online-4] Periodic table online: Properties of vanadium (II) oxide

[Jean_d'._Ans,_Ellen_Lax,_Roger_Blachnik-5] Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 790 ( limited preview in Google Book search).

[Gurdeep_Raj-6] Gurdeep Raj: Advanced Inorganic Chemistry . Vol. 1, 1975, ISBN 81-87224-03-7 , pp. 925 ( limited preview in Google Book Search).