Самарий (Sm)

chemical element with atomic number of 62

Atomic Number	62
Atomic Weight	150.36
mass number	152

Group
Period	6
Block	f

proton	62 p⁺
neutron	90 n⁰
electron	62 e^-

Physical Property

Atomic Radius	185 pm 280 pm
molar volume	19.9 cm³/mol
Covalent Radius	172 pm 134 pm 198 pm
Metallic Radius
ionic radius	122 pm 127 pm 132 pm 95.8 pm 102 pm 107.9 pm 113.2 pm 124 pm
Crystal Radius	136 pm 141 pm 146 pm 109.8 pm 116 pm 121.9 pm 127.2 pm 138 pm
Van der Waals radius	236 pm 271 pm 352 pm
density	7.52 g/cm³ 7160 kg/m³

Chemical Property

{ERROR}

energy

proton affinity
electron affinity
ionization energy	5.64371 eV/particle 11.07 eV/particle 23.4 eV/particle 41.4 eV/particle 62.66 eV/particle 90 eV/particle 103 eV/particle 118 eV/particle 141 eV/particle 158 eV/particle 179 eV/particle 208 eV/particle 237 eV/particle 257 eV/particle 276 eV/particle 306.5 eV/particle 474 eV/particle 506 eV/particle 543 eV/particle 581 eV/particle 617 eV/particle 658 eV/particle 702 eV/particle 742 eV/particle 782 eV/particle 822 eV/particle 976 eV/particle 1016 eV/particle 1060 eV/particle 1103 eV/particle 1180 eV/particle 1226 eV/particle 1332 eV/particle 1381.6 eV/particle 2371 eV/particle 2466 eV/particle 2569 eV/particle 2676 eV/particle 2782 eV/particle 2887 eV/particle 3028 eV/particle 3137 eV/particle 3253 eV/particle 3363 eV/particle 3669 eV/particle 3766 eV/particle 3873 eV/particle 3971 eV/particle 4227 eV/particle 4337 eV/particle 4548 eV/particle 4655 eV/particle 10494 eV/particle 10762 eV/particle 11060 eV/particle 11337 eV/particle 12264 eV/particle 12588 eV/particle 12992 eV/particle 13262.85 eV/particle 53986.11 eV/particle 55214.23 eV/particle

enthalpy of vaporization	165 kJ/mol
enthalpy of fusion	8.9 kJ/mol
standard enthalpy of formation	206.7 kJ/mol
electron

electron shell	2, 8, 18, 24, 8, 2

valence electron	2 ⓘ

electron configuration	[Xe] 4f⁶ 6s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f⁶ 6s²

oxidation number	0, 1, 2, 3
electronegativity	0.185468 1.17
Electrophilicity Index
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point	2067.15 K
Melting Point	1345.15 K
critical pressure
critical temperature
triple point
appearance
color	Black #ff1493 #8fffc7 #8fffc7
appearance	silvery white
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion	0.0000127 1/K
molar heat capacity	29.54 J/(mol K)
Specific Heat Capacity	0.197 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	1.1 MS/m
electrical resistivity	0.00000094 Ω*m
superconductivity
magnetism
type	paramagnetic
magnetic susceptibility (Mass)	0.000000111 m³/Kg
magnetic susceptibility (Molar)	0.00000001669 m³/mol
magnetic susceptibility (Volume)	0.00081618
magnetic ordering
Curie temperature
Néel temperature	106 K
structure
Crystal Structure	{ERROR}
lattice constant	9 Å
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
hardness	441 MPa 412 MPa
bulk modulus	38 GPa
shear modulus	20 GPa
Young's modulus	50 GPa
Poisson's ratio	0.27
speed of sound	2130 m/s
classification
Category	Actinides, Lanthanides
CAS Group
IUPAC Group
Glawe Number	27
Mendeleev Number	23
Pettifor Number	28
Geochemical Class	rare earth & related
Goldschmidt classification	litophile

other

Gas Basicity
polarizability	192 ± 20 a₀
C6 Dispersion Coefficient	3130 a₀
allotrope
Neutron cross section	5900
Neutron Mass Absorption	4.7
quantum number	7F0
space group	166 (R_3m)

Isotopes of Samarium

Stable Isotopes	2
Unstable Isotopes	39
Natural Isotopes	7

¹²⁸Sm

mass number	128
neutron number	66
Relative Atomic Mass	127.957971 ± 0.000537 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)

¹²⁹Sm

mass number	129
neutron number	67
Relative Atomic Mass	128.954557 ± 0.000537 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	550 ± 100 ms
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1999
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

¹³⁰Sm

mass number	130
neutron number	68
Relative Atomic Mass	129.948792 ± 0.000429 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1999
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹³¹Sm

mass number	131
neutron number	69
Relative Atomic Mass	130.946022 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	1.2 ± 0.2 s
spin	5/2
nuclear quadrupole moment
time of discovery or invention	1986
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

¹³²Sm

mass number	132
neutron number	70
Relative Atomic Mass	131.940805 ± 0.000322 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	4 ± 0.3 s
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1989
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

¹³³Sm

mass number	133
neutron number	71
Relative Atomic Mass	132.93856 ± 0.00032 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	2.89 ± 0.16 s
spin	5/2
nuclear quadrupole moment
time of discovery or invention	1977
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

¹³⁴Sm

mass number	134
neutron number	72
Relative Atomic Mass	133.93411 ± 0.00021 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	9.5 ± 0.8 s
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1977
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁵Sm

mass number	135
neutron number	73
Relative Atomic Mass	134.93252 ± 0.000166 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	10.3 ± 0.5 s
spin	7/2
nuclear quadrupole moment
time of discovery or invention	1977
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.02%

¹³⁶Sm

mass number	136
neutron number	74
Relative Atomic Mass	135.928275553 ± 0.000013416 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	47 ± 2 s
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1982
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁷Sm

mass number	137
neutron number	75
Relative Atomic Mass	136.927007959 ± 0.000030718 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	45 ± 1 s
spin	9/2
nuclear quadrupole moment
time of discovery or invention	1986
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁸Sm

mass number	138
neutron number	76
Relative Atomic Mass	137.923243988 ± 0.000012686 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	3.1 ± 0.2 m
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1982
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁹Sm

mass number	139
neutron number	77
Relative Atomic Mass	138.922296631 ± 0.000011684 Da
g-factor	-1.06 ± 0.04
natural abundance
radioactivity	☢️ radioactive element
half-life	2.57 ± 0.1 m
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1971
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴⁰Sm

mass number	140
neutron number	78
Relative Atomic Mass	139.918994714 ± 0.000013416 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	14.82 ± 0.12 m
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1967
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴¹Sm

mass number	141
neutron number	79
Relative Atomic Mass	140.918481545 ± 0.000009162 Da
g-factor	-1.48 ± 0.04
natural abundance
radioactivity	☢️ radioactive element
half-life	10.2 ± 0.2 m
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1967
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴²Sm

mass number	142
neutron number	80
Relative Atomic Mass	141.915209415 ± 0.000002002 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	72.49 ± 0.05 m
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1959
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
e⁺ (positron emission)	5%

¹⁴³Sm

mass number	143
neutron number	81
Relative Atomic Mass	142.914634848 ± 0.000002951 Da
g-factor	0.67333333333333 ± 0.013333333333333
natural abundance
radioactivity	☢️ radioactive element
half-life	8.75 ± 0.06 m
spin	3/2
nuclear quadrupole moment	0.4 ± 0.2
time of discovery or invention	1956
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
e⁺ (positron emission)	40%
ϵ (electron capture)	60%

¹⁴⁴Sm

mass number	144
neutron number	82
Relative Atomic Mass	143.912006285 ± 0.000001566 Da
g-factor	0
natural abundance	3.08 ± 0.04
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1933
parity	+

decay mode	intensity
2β⁺ (double β⁺ decay)

¹⁴⁵Sm

mass number	145
neutron number	83
Relative Atomic Mass	144.913417157 ± 0.000001594 Da
g-factor	-0.32 ± 0.0031428571428571
natural abundance
radioactivity	☢️ radioactive element
half-life	340 ± 3 d
spin	7/2
nuclear quadrupole moment	-0.6 ± 0.07
time of discovery or invention	1947
parity	-

decay mode	intensity
ϵ (electron capture)	100%

¹⁴⁶Sm

mass number	146
neutron number	84
Relative Atomic Mass	145.913046835 ± 0.000003269 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	68 ± 7 My
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1953
parity	+

decay mode	intensity
α (α emission)	100%

¹⁴⁷Sm

mass number	147
neutron number	85
Relative Atomic Mass	146.914904401 ± 0.000001354 Da
g-factor	-0.23114285714286 ± 0.0004
natural abundance	15 ± 0.14
radioactivity	☢️ radioactive element
half-life	106.6 ± 0.5 Gy
spin	7/2
nuclear quadrupole moment	-0.26 ± 0.03
time of discovery or invention	1933
parity	-

decay mode	intensity
α (α emission)	100%

¹⁴⁸Sm

mass number	148
neutron number	86
Relative Atomic Mass	147.914829233 ± 0.000001337 Da
g-factor	0
natural abundance	11.25 ± 0.09
radioactivity	☢️ radioactive element
half-life	6.3 ± 1.3 Py
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1933
parity	+

decay mode	intensity
α (α emission)	100%

¹⁴⁹Sm

mass number	149
neutron number	87
Relative Atomic Mass	148.917191211 ± 0.000001241 Da
g-factor	-0.19077142857143 ± 0.00031428571428571
natural abundance	13.82 ± 0.1
radioactivity	☢️ radioactive element
half-life
spin	7/2
nuclear quadrupole moment	0.075 ± 0.008
time of discovery or invention	1933
parity	-

decay mode	intensity
α (α emission)

¹⁵⁰Sm

mass number	150
neutron number	88
Relative Atomic Mass	149.917281993 ± 0.000001193 Da
g-factor	0
natural abundance	7.37 ± 0.09
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1934
parity	+

¹⁵¹Sm

mass number	151
neutron number	89
Relative Atomic Mass	150.919938859 ± 0.000001191 Da
g-factor	-0.1442 ± 0.00024
natural abundance
radioactivity	☢️ radioactive element
half-life	94.6 ± 0.6 y
spin	5/2
nuclear quadrupole moment	0.71 ± 0.07
time of discovery or invention	1947
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵²Sm

mass number	152
neutron number	90
Relative Atomic Mass	151.919738646 ± 0.00000109 Da
g-factor	0
natural abundance	26.74 ± 0.09
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1933
parity	+

¹⁵³Sm

mass number	153
neutron number	91
Relative Atomic Mass	152.922103576 ± 0.0000011 Da
g-factor	-0.014 ± 0.002
natural abundance
radioactivity	☢️ radioactive element
half-life	46.2846 ± 0.0023 h
spin	3/2
nuclear quadrupole moment	1.3 ± 0.12
time of discovery or invention	1938
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁴Sm

mass number	154
neutron number	92
Relative Atomic Mass	153.922215756 ± 0.0000014 Da
g-factor	0
natural abundance	22.74 ± 0.14
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1933
parity	+

decay mode	intensity
2β⁻ (double β⁻ decay)

¹⁵⁵Sm

mass number	155
neutron number	93
Relative Atomic Mass	154.924646645 ± 0.000001429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	22.18 ± 0.06 m
spin	3/2
nuclear quadrupole moment	1.13 ± 0.13
time of discovery or invention	1951
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁶Sm

mass number	156
neutron number	94
Relative Atomic Mass	155.925538191 ± 0.000009148 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	9.4 ± 0.2 h
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1951
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁷Sm

mass number	157
neutron number	95
Relative Atomic Mass	156.928418598 ± 0.000004759 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	8.03 ± 0.07 m
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1973
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁸Sm

mass number	158
neutron number	96
Relative Atomic Mass	157.929949262 ± 0.000005133 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	5.3 ± 0.03 m
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1970
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁹Sm

mass number	159
neutron number	97
Relative Atomic Mass	158.93321713 ± 0.00000637 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	11.37 ± 0.15 s
spin	5/2
nuclear quadrupole moment
time of discovery or invention	1986
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶⁰Sm

mass number	160
neutron number	98
Relative Atomic Mass	159.935337032 ± 0.0000021 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	9.6 ± 0.3 s
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1986
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶¹Sm

mass number	161
neutron number	99
Relative Atomic Mass	160.939160062 ± 0.000007318 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	4.8 ± 0.4 s
spin	7/2
nuclear quadrupole moment
time of discovery or invention	1998
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶²Sm

mass number	162
neutron number	100
Relative Atomic Mass	161.941621687 ± 0.000003782 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	2.7 ± 0.3 s
spin	0
nuclear quadrupole moment	0
time of discovery or invention	2005
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶³Sm

mass number	163
neutron number	101
Relative Atomic Mass	162.945679085 ± 0.0000079 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	1.3 ± 0.5 s
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	2012
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶⁴Sm

mass number	164
neutron number	102
Relative Atomic Mass	163.948550061 ± 0.0000044 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	1.43 ± 0.24 s
spin	0
nuclear quadrupole moment	0
time of discovery or invention	2012
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁶⁵Sm

mass number	165
neutron number	103
Relative Atomic Mass	164.95329 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	980 ± 210 ms
spin	5/2
nuclear quadrupole moment
time of discovery or invention	2012
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁶⁶Sm

mass number	166
neutron number	104
Relative Atomic Mass	165.956575 ± 0.000429 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	800 ± 630 ms
spin	0
nuclear quadrupole moment	0
time of discovery or invention	2017
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶⁷Sm

mass number	167
neutron number	105
Relative Atomic Mass	166.962072 ± 0.000537 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	7/2
nuclear quadrupole moment
time of discovery or invention	2018
parity	-

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

¹⁶⁸Sm

mass number	168
neutron number	106
Relative Atomic Mass	167.966033 ± 0.000322 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention	2018
parity	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

важвылӧм

discoverer or inventor	Paul Émile Lecoq de Boisbaudran
location of discovery	France
time of discovery or invention	1879
etymology	Named after the mineral samarskite.
pronunciation	seh-MER-i-em (English)

source

Abundance
Abundance in Earth's crust	7.05 mg/kg
natural abundance (ocean)	0.00000045 mg/L
natural abundance (human body)
natural abundance (meteoroid)	0.000017 %
natural abundance (Шонді)	0.0000001 %
Abundance in Universe	0.0000005 %

Nuclear Screening Constants

1	s	1.2217
2	p	4.269
2	s	16.2652
3	d	13.7711
3	p	19.5815
3	s	19.9736
4	d	33.7604
4	f	38.4684
4	p	30.912
4	s	29.7076
5	p	45.719
5	s	43.751
6	s	53.9882

Самарий on ChemicalAid

Самарий (Sm)

Physical Property

Chemical Property

other

Isotopes of Samarium

128Sm

129Sm

130Sm

131Sm

132Sm

133Sm

134Sm

135Sm

136Sm

137Sm

138Sm

139Sm

140Sm

141Sm

142Sm

143Sm

144Sm

145Sm

146Sm

147Sm

148Sm

149Sm

150Sm

151Sm

152Sm

153Sm

154Sm

155Sm

156Sm

157Sm

158Sm

159Sm

160Sm

161Sm

162Sm

163Sm

164Sm

165Sm

166Sm

167Sm

168Sm

важвылӧм

source

Nuclear Screening Constants

¹²⁸Sm

¹²⁹Sm

¹³⁰Sm

¹³¹Sm

¹³²Sm

¹³³Sm

¹³⁴Sm

¹³⁵Sm

¹³⁶Sm

¹³⁷Sm

¹³⁸Sm

¹³⁹Sm

¹⁴⁰Sm

¹⁴¹Sm

¹⁴²Sm

¹⁴³Sm

¹⁴⁴Sm

¹⁴⁵Sm

¹⁴⁶Sm

¹⁴⁷Sm

¹⁴⁸Sm

¹⁴⁹Sm

¹⁵⁰Sm

¹⁵¹Sm

¹⁵²Sm

¹⁵³Sm

¹⁵⁴Sm

¹⁵⁵Sm

¹⁵⁶Sm

¹⁵⁷Sm

¹⁵⁸Sm

¹⁵⁹Sm

¹⁶⁰Sm

¹⁶¹Sm

¹⁶²Sm

¹⁶³Sm

¹⁶⁴Sm

¹⁶⁵Sm

¹⁶⁶Sm

¹⁶⁷Sm

¹⁶⁸Sm