Basic Information

Name: Holmium 
Symbol: Ho 
Atomic Number: 67 
Atomic Mass: 164.93031 amu 
Melting Point: 1470.0 °C (1743.15 K, 2678.0 °F) 
Boiling Point: 2720.0 °C (2993.15 K, 4928.0 °F) 
Number of Protons/Electrons: 67 
Number of Neutrons: 98 
Classification: Rare Earth 
Crystal Structure: Hexagonal 
Density @ 293 K: 8.54 g/cm3 
Color: Silver
Date of Discovery: 1878 
Discoverer: J.L. Soret 
Name Origin: Form the Latin word Holmia (Stockholm) 
Uses: nuclear reactors 
Obtained From: gadolinite