The plural form of didymium, referring to multiple samples, quantities, or contexts involving this rare earth element mixture.
Standard English plural formation adding '-s' to 'didymium', following regular plural conventions for chemical elements.
Even the plural form 'didymiums' is rarely used in modern chemistry because didymium itself has been divided into its constituent elements—it's like discussing 'dihydrogenmonoxydes' when you really mean 'water molecules,' using an obsolete classification.
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