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The Rare Earths

Note 69 — Chapter IV · THE TANTALO-COLUMBATES

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Lange (Abstr. Chem. Soc. 1911, 100, ii. 499) gives the limits 1⁄2 and 1⁄6.

[70] Abstr. Chem. Soc. 1907, 92, ii. 885.

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