Didymium
Didimio
- Date
- 1841 · confidence high
- Place
- Stockholm, Sweden
- Credited to
- Carl Gustav Mosander
- Field
- Matter & energy
What was discovered
An "element" described by Carl Gustav Mosander from cerium residues, shown in 1885 to actually be a mixture of praseodymium and neodymium; used today in eye-protection glasses and filters.
What it led to
- Later separation into praseodymium and neodymium (1885)
- Protective eyewear for glassblowers and blacksmiths
- Photographic filters that enhance autumn foliage
- Sodium-light-blocking filters in industrial processes