Physical Properties of Thorium and Calcium
Physical Properties
Melting Point
1,750.00 °C
17
839.00 °C
99+
Boiling Point
4,790.00 °C
8
1,484.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silver
Gray
Luster
NA
NA
Hardness
Mohs Hardness
3.00
12
1.75
17
Brinell Hardness
390.00 MPa
29
170.00 MPa
99+
Vickers Hardness
295.00 MPa
29
Not Available
Speed of Sound
2,490.00 m/s
36
3,810.00 m/s
19
Optical Properties
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
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