Symbol Ho Atomic radius: pm 174 Fusion: kJ/Mole 17.0
Name Holmium Ionic radius: pm - Boiling point: C 2700
Atomic number 67 Electron affinity - Melting point: C 1474
Atomic weight 164.9 1st  ion potential 6.02 Specific Heat Cap: J/(g K) 0.17
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) 0.16
Configuration [Xe]4f116s2 Crystal structure Hex Electrical Cond 0.0124
Oxidation states 3 Density 8.80 Abundance: mg/kg-crust 1.3
Electronegativity 1.23 Vaporization: kJ/Mole 251.0    
Holmium was discovered in 1878 spectroscopically by J.L. Soret and M. Delafontaine.  It was then discovered independently by Per Teodor Cleve in 1879 when he separated it chemically from erbium and thulium. Uses - alloys