Vanadium(II) oxide

Odorless gray solid

Fixed

5.76 g · cm -3

950 ° C (other source 1790 ° C)

2627 ° C

Insoluble in water

Risk

Template: Infobox chemical / molecular formula search available

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

Production and representation

Vanadium ( II) oxide can be obtained by the reaction of vanadium ( III) oxide with vanadium in a vacuum at temperatures of 1200-1600 ° C.

Properties

Vanadium (II ) oxide is an odorless gray powder and has a homogeneity range of VO0, VO1 86 to 25 According to different authors, it probably consists of two adjacent phases VO0, 86 to VO0, 91 and VO1, VO1 05 to 25 It has a crystal structure of the sodium chloride type (a = 402.7 to 413.8 pm ) that is a cubic crystal structure with a space group Fm3m. It is soluble in acids, with V ( H2O) 62 ion form, which turn the solution purple. These solutions act as a strong reducing agent, wherein the ions convert to air quickly to V ( H2O) 63 ions, which is green visible by a color change of the solution.