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Blomstrandite.

Оглавление

Hydrated titano-columbate of U, with some Fe and Ca. TiO₂ = 10·7%.

Massive.

G = 4·17-4·25. H = 51⁄2. Black; opaque.

Nohl, Sweden.

The Rare Earths: Their Occurrence, Chemistry, and Technology

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