ସାମାରିଅମ

ଉଇକିପିଡ଼ିଆ ରୁ

| colspan=2 style="text-align: center" | Main article: Isotopes of samarium

Samarium
62Sm
-

Sm

Pu
promethiumsamariumeuropium
ଭୌତିକ ରୁପ
silvery white
ସାଧାରଣ ଧର୍ମ
ନାମ, ପ୍ରତୀକ,
ପରମାଣୁ କ୍ରମାଙ୍କ
samarium, Sm,
62
ଉଚ୍ଚାରଣ /səˈmɛəriəm/ sə-mair-ee-əm
ମୌଳିକ ପ୍ରକାର lanthanide
ଶ୍ରେଣୀ, ପର୍ଯ୍ୟାୟ, ବ୍ଲକ୍ n/a, 6, f
ମାନକ ପରମାଣବିକ ଓଜନ 150.36
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ [Xe] 6s2 4f6
2, 8, 18, 24, 8, 2
Electron shells of samarium (2, 8, 18, 24, 8, 2)
ଇତିହାସ
ଆବିଷ୍କାର Lecoq de Boisbaudran (1879)
First isolation Lecoq de Boisbaudran (1879)
ଭୌତିକ ଧର୍ମ
ଅବସ୍ଥା solid
(ରୁମ୍ ଟେମ୍ପରେଚର୍‌ରେ ଘନତା) 7.52 g·cm−3
Liquid density at m.p. 7.16 g·cm−3
ଗଳନାଙ୍କ 1345 K, 1072 °C, 1962 °F
ସ୍ଫୁଟନାଙ୍କ 2067 K, 1794 °C, 3261 °F
Heat of fusion 8.62 kJ·mol−1
Heat of vaporization 165 kJ·mol−1
Molar heat capacity 29.54 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1001 1106 1240 (1421) (1675) (2061)
Atomic properties
Oxidation states 4, 3, 2, 1

(mildly basic oxide)

Electronegativity 1.17 (Pauling scale)
Ionization energies 1st: 544.5 kJ·mol−1
2nd: 1070 kJ·mol−1
3rd: 2260 kJ·mol−1
Atomic radius 180 pm
Covalent radius 198±8 pm
Miscellanea
Crystal structure rhombohedral
Magnetic ordering paramagnetic[୧]
Electrical resistivity (r.t.) (α, poly) 0.940 µΩ·m
Thermal conductivity 13.3 W·m−1·K−1
Thermal expansion (r.t.) (α, poly) 12.7 µm/(m·K)
Speed of sound (thin rod) (20 °C) 2130 m·s−1
Young's modulus (α form) 49.7 GPa
Shear modulus (α form) 19.5 GPa
Bulk modulus (α form) 37.8 GPa
Poisson ratio (α form) 0.274
Vickers hardness 412 MPa
Brinell hardness 441 MPa
CAS registry number 7440-19-9
Most stable isotopes
iso NA half-life DM DE (MeV) DP
144Sm 3.07% 144Sm is stable with 82 neutrons
145Sm syn 340 d ε - 145Pm
146Sm trace 1.03×108 y α 2.529 142Nd
147Sm 14.99% 1.06×1011 y α 2.310 143Nd
148Sm 11.24% 7×1015 y α 1.986 144Nd
149Sm 13.82% >2×1015 y α 1.870 145Nd
150Sm 7.38% 150Sm is stable with 88 neutrons
151Sm syn 90 y β - 151Eu
152Sm 26.75% 152Sm is stable with 90 neutrons
153Sm syn 46.284 h β - 153Eu
154Sm 22.75% >2.3×1018 y ββ 1.2510 154Gd
· r

ସାମାରିଅମ ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Smପରମାଣୁ କ୍ରମାଙ୍କ ୬୨ ଅଟେ ।

ଧର୍ମ[ସମ୍ପାଦନା]

ଭୌତିକ[ସମ୍ପାଦନା]

ରସାୟନିକ[ସମ୍ପାଦନା]

ସମସ୍ଥାନିକ[ସମ୍ପାଦନା]

ଉପସ୍ଥିତି[ସମ୍ପାଦନା]

ଗଠନ[ସମ୍ପାଦନା]

ଉତ୍ପାଦନ[ସମ୍ପାଦନା]

ବ୍ୟବହାର[ସମ୍ପାଦନା]

ଆହୁରି ଦେଖନ୍ତୁ[ସମ୍ପାଦନା]

ଆଧାର[ସମ୍ପାଦନା]

  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.

ଆହୁରି ପଢନ୍ତୁ[ସମ୍ପାଦନା]

  • Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth–Heinemann. ISBN 0-08-037941-9.

ବାହାର ଲିଙ୍କ[ସମ୍ପାଦନା]