Physical Properties of Thulium and Darmstadtium
Melting Point
1,545.00 °C
  
23
Not Available
  
Boiling Point
1,730.00 °C
  
99+
Not Available
  
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery Gray
  
Unknown
  
Luster
Metallic
  
Unknown Luster
  
Hardness
  
  
Brinell Hardness
Not Available
  
Vickers Hardness
Not Available
  
Speed of Sound
Not Available
  
5,090.00 m/s
  
9
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available