melanophlogiteMin.|mɛləˈnɒflədʒaɪt| [a. G. melanophlogit (Lasaulx 1876), f.Gr. µελανο-, µέλας black + ϕλογ-, ϕλόξ flame; indicating that the mineral turns black when heated.] An impure form of silica found in minute cubes on sulphur. 1879Dana Man.Min. & Lithol. (ed. 3) 241.