Niobium monoxide | |
---|---|
Other names
niobium(II) oxide, columbium monoxide |
|
Identifiers | |
CAS number | 12034-57-0 |
ChemSpider | 74751 |
|
|
Properties | |
Molecular formula | NbO |
Molar mass | 108.906 g/mol |
Appearance | grey solid |
Density | 7.3 gcm3 |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
|
Infobox references |
Niobium monoxide, is the chemical compound with the formula NbO. It is a grey solid with metallic conductivity.[1] It has an unusual cubic crystal structure, related to the rock salt structure, where both niobium and oxygen atoms are four coordinate square planar.[1] The niobium atoms are arranged in octahedra and there is a structural similarity to the octahedral niobium clusters in lower halides of niobium.[1] In NbO the Nb-Nb bond length is 298 pm which compares to 285 pm in the metal.[1] One study of the bonding concludes that there are strong and nearly covalent bonds between the metal atoms.[2]
It is a superconductor at 1.38 K.[3] It is used in capacitors where a layer of Nb2O5 is formed around NbO grains as the dielectric.[4]
NbO can be prepared by reduction of Nb2O5 by H2[1]
|