Atomic number: 67

Symbol: Ho

Category: lanthanoid metal

Density at 25°C: solid: density: 8.79 g·cm−3

Holmium, like other lanthenoids or rare earth's is found almost exclusively in minerals.  It's main use is in colouring zirconia crystals.  Sometimes it is used for it's magnetic properties and and in solid state lasers for medical or dental work because the beam is safer for the eyes. 

Holmium metal. image: images-of-elements.com

Use, natural applications or common combinations: 

  • lasers
  • found in minerals:  monazite and gadolinite

Basic characteristics:

  • Standard atomic weight: 164.930 32(2)
  • Melting point:  1461 °C
  • Boiling point: 2720 °C
  • Radioactivity: most naturally stable