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ନାମ, ପ୍ରତୀକ | samarium, Sm |
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Appearance | silvery white |
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ଉଚ୍ଚାରଣ | sə-MAIR-ee-əm |
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ପରମାଣୁ କ୍ରମାଙ୍କ (Z) | 62 |
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ଶ୍ରେଣୀ, ବ୍ଳକ | group n/a, f-block |
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ପର୍ଯ୍ୟାୟ | period 6 |
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ମୌଳିକ ପ୍ରକାର | lanthanide |
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ମାନକ ପରମାଣବିକ ଓଜନ (Ar) | 150.36 |
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ଇଲେକ୍ଟ୍ରୋନ୍ ବିନ୍ୟାସ | [Xe] 6s2 4f6 |
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per shell | 2, 8, 18, 24, 8, 2 |
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ଅବସ୍ଥା | solid |
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ଗଳନାଙ୍କ | 1345 K (1072 °C, 1962 °F) |
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ସ୍ଫୁଟନାଙ୍କ | 2067 K (1794 °C, 3261 °F) |
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Density near r.t. | 7.52 g/cm3 |
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when liquid, at m.p. | 7.16 g/cm3 |
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Heat of fusion | 8.62 kJ/mol |
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Heat of | 165 kJ/mol |
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Molar heat capacity | 29.54 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
at T (K)
|
1001
|
1106
|
1240
|
(1421)
|
(1675)
|
(2061)
| |
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Oxidation states | 4, 3, 2, 1
(mildly basic oxide) |
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Electronegativity | Pauling scale: 1.17 |
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Atomic radius | empirical: 180 pm |
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Covalent radius | 198±8 pm |
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Crystal structure | rhombohedral |
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Speed of sound thin rod | 2130 m/s (at 20 °C) |
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Thermal expansion | (r.t.) (α, poly) 12.7 µm/(m·K) |
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Thermal conductivity | 13.3 W/(m·K) |
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Electrical resistivity | (r.t.) (α, poly) 0.940 µ Ω·m |
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Magnetic ordering | paramagnetic[୧] |
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Young's modulus | (α form) 49.7 GPa |
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Shear modulus | (α form) 19.5 GPa |
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Bulk modulus | (α form) 37.8 GPa |
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Poisson ratio | (α form) 0.274 |
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Vickers hardness | 412 MPa |
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Brinell hardness | 441 MPa |
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CAS Number | 7440-19-9 |
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ଆବିଷ୍କାର | Lecoq de Boisbaudran (1879) |
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First isolation | Lecoq de Boisbaudran (1879) |
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| references |