| 41. | In 1839 the third source for rare earths became available.
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| 42. | Nelsonite is currently mined in China for rare earth elements.
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| 43. | Why do the rare earth metals behave very chemically similar?
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| 44. | I'm not just talking about rare earth material either.
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| 45. | Of these, 17 elements are called rare earth minerals.
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| 46. | Rare earths were not among the goods specifically listed.
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| 47. | More recently, Rare Earth attracted Flores at United Services.
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| 48. | One of his songs was recorded by Rare Earth.
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| 49. | Many rare earth nickelates have the Ruddlesden-Popper phase structure.
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| 50. | In the original draft of the book I had three chapters on the rare earth elements.
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