| 31. | The Khanashin carbonatite in Helmand Province contains of rare earth elements.
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| 32. | Our rare earth article needs a good deal of help.
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| 33. | Distribution of rare earth elements was studied in a labolatory.
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| 34. | Volcanoes on the Coastal Range and light rare earth elements.
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| 35. | Bastn�site ore is typically used to produce rare earth metals.
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| 36. | It is even less abundant than the so-called rare earths.
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| 37. | The secret lies in adding the rare earth element erbium to the glass fiber.
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| 38. | At the Sorbonne, Matignon mostly worked on rare earth elements.
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| 39. | Baotou is the world's biggest supplier of rare earth minerals.
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| 40. | Later, it also started to extract rare earth metal oxides.
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