Basic Information

Name: Dysprosium 
Symbol: Dy 
Atomic Number: 66 
Atomic Mass: 162.5 amu 
Melting Point: 1412.0 °C (1685.15 K, 2573.6 °F) 
Boiling Point: 2562.0 °C (2835.15 K, 4643.6 °F) 
Number of Protons/Electrons: 66 
Number of Neutrons: 97 
Classification: Rare Earth 
Crystal Structure: Hexagonal 
Density @ 293 K: 8.536 g/cm3 
Color: Unknown
Date of Discovery: 1886 
Discoverer: Paul Emile Lecoq de Boisbaudran 
Name Origin: From the Greek word dysprositos (hard to get at) 
Uses: nuclear reactors 
Obtained From: erbium, holmium