April 2020
Intermediate to advanced
296 pages
5h 20m
English

Without Er to amplify, our YouTube clips would stall,
Its salts of pink tint glass ’n’ glaze—trivalent cations all.
Shields welders’ eyes ’gainst infrared,
ee-arr
TWELFTH IN THE LANTHANOID SERIES
Erbium belongs to a select quartet of elements (the other three are yttrium, terbium, and ytterbium) that were discovered in a coal-like mineral obtained from an old quarry near the small Swedish village of Ytterby, not far from Stockholm.
Erbium deserves to be a better-known ...