| 释义 |
didymium Chem.|dɪˈdɪmɪəm|
[mod. f. Gr. δίδυµ-ος twin, with ending -ium used with new metals. The name referred to its close association (‘twin-brotherhood’) with lanthanium previously discovered, both metals being found associated with cerium.]
A rare metal, discovered by Mosander in 1841; found only in association with cerium and lanthanium. Symbol Di.
1842Chemical Gaz. I. 4 Mosander, the discoverer of lanthanium, has found that these metals are always mixed with a third new element (didymium), from which at present it is impossible to separate them. 1867W. A. Miller Elem. Chem. i. (ed. 4) 166 Small quantities of didymium in solutions of lanthanium and cerium. 1892Daily News 11 Feb. 3/6 A method of separating cerium from didymium. |