ilmenorutile Min.
(ˌɪlmənəʊˈruːtaɪl, -ɪl)
[ad. G. ilmenorutil (N. von Kokscharow Materialen zur Mineralogie Russlands (1854–7) II. 352): see ilmenite and rutile.]
A black variety of rutile containing iron, niobium, and tantalum.
| 1861 H. W. Bristow Gloss. Mineral. 189/2 Ilmenorutile, Von Kokscharow. A variety of Rutile occurring in the form of the fundamental pyramid, without any prismatic planes. 1929 Encycl. Brit. XIX. 774/1 The colour [of rutile] is usually reddish-brown, though..black in the ferruginous varieties (‘nigrine’ and ‘ilmenorutile’). 1962 W. A. Deer et al. Rock-Forming Min. V. 35 Apart from the ferroan and ferrian varieties of rutile, there is also the niobian variety, or ilmenorutile, with up to 60 per cent. of Fe(Nb,Ta)2O6 with Nb > Ta. 1968 Daily Tel. 12 Nov. 14/4 The ilmenite mines are in the Jeseniky mountain range near the Polish border, and in Pisek, south of Pilsen, where the mines contain ilmeno-rutile, a more complex mineral suitable for the production of thorium as a trigger for H-bombs, as well as titanium. |