| 1 | A rare element was found last year. | |
| 2 | Uranium is very valuable because it is a rare element. | |
| 3 | The product can be used for glass frosting or extracting rare elements and used as a preservative or a mordant. | |
| 4 | One method which can be used in analyzing rare element Nb in the presence of Ta and other impurities is proposed in the paper. | |
| 5 | A coarse-grained granite, sometimes rich in rare elements such as uranium, tungsten, and tantalum. |