Samarium

Samarium
Symbol: Sm
Atomic Number: 62
Atomic Weight: 150.36
Boiling Point: 2067 K
Melting Point: 1347 K
Density at 300K: 7.52 g/cm³
Covalent radius: 1.62
Atomic radius: 2.59
Atomic volume: 19.90 cm³/mol
First ionization potental: 5.63 V
Specific heat capacity: 0.197 Jg^-1K^-1
Thermal conductivity: 13.3 Wm^-1K^-1
Electrical conductivity: 1.1*10⁶Ω^-1m^-1
Heat of fusion: 11.09 kJ/mol
Heat of vaporization: 191.63 kJ/mol
Electronegativity: 1.17 (Pauling's)

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Sa*ma"ri*um (?), n. [NL., fr. E. samarskite.] Chem.

A rare metallic element of doubtful identity.

⇒ Samarium was discovered, by means of spectrum analysis, in certain minerals (samarskite, cerite, etc.), in which it is associated with other elements of the earthy group. It has been confounded with the donbtful elements decipium, philippium, etc., and is possibly a complex mixture of elements not as yet clearly identified. Symbol Sm. Provisional atomic weight 150.2.<-- a true element. Symb. Sa or Sm; At. No. 62; At. wt. 150.43. Valence 2 or 3. -->

 

© Webster 1913.