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1.Berthierite is a rare mineral that occurs in the Earth's crust.
贝特利石是一种稀有矿物，存在于地球的地壳中。
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2. The chemical properties of Berthierite are similar to those of other rare earth metals.
贝特利石的化学性质与其他稀有稀土金属相似。
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3. The study of Berthierite has important implications for understanding the behavior of other rare earth elements.
贝特利石的研究对于理解其他稀有稀土元素的行为具有重要意义。