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Pitchblende.

Оглавление

A mixture of oxides, chiefly UO₂ and UO₃, but without E₂O₃ or ThO₂.

Amorphous.

G = 5-6·5. H = 3-4. Black; resinous lustre.

Bohemia; Cornwall; Carolina; Norway, etc.

The Rare Earths: Their Occurrence, Chemistry, and Technology

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