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Rare Earth Comminution

1963.The crustal abundance of the individual rare earth elements is shown in fig.2.As a comparison, the crustal abundance of gold and silver are 5 10 7 wt.And 1 the year 2015 10 5 wt.Respectively trifonov, 1963.The difculty in rare earth mineral exploitation is that the rare earth minerals are not commonly found in eco-.

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