About the sample

This is a commercial sample. Erbium is packed in glass ampoule under argon to protect it from corrosion. It is a part of the private collection of Metodija Najdoski.
Z68
ρ / g/cm39.07
tt, mp / °C1529
tv, bp / °C2868
Ar167.26
Electronegativity, (X)1.24
Crystal structureHexagonal
Extended informationhttps://www.webelements.com/erbium/