… nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also …
Explanatory notes
… nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also … compounds covered by this heading each contain two or more elements, one of which is described by the term used … obtained either by heating the pure metal in nitrogen at a temperature of 1,100 °C or 1,200 °C, or by heating at a …