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Ilmenorutile.

Оглавление

FeO,Nb₂O₅,5TiO₂? TiO₂ = 66-75%.

Tetragonal, very near to Rutile (q.v.).

G = 4·3-5·0. H = 6-7. Brown to black; opaque.

Ilmen Mountains, Russia.

The Rare Earths: Their Occurrence, Chemistry, and Technology

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