Lantani

Lantani (La)

chemical element with symbol La and atomic number 57
Atomic Number57
Atomic Weight138.90547
Rhif màs139
Group3
Period6
Blockd
Proton57 p+
Niwtron82 n0
Electron57 e-
Animated Bohr model of La (Lantani)

Nodwedd Ffisegol

Atomic Radius
195 pm
molar volume
covalent radius
180 pm
Metallic Radius
169 pm
ionic radius
103.2 pm
Crystal Radius
117.2 pm
Van der Waals radius
243 pm
density
6.15 g/cm³
Atomic Radii Of The Elements: Lantani0102030405060708090100110120130140150160170180190200210220230240250pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
1,013 kJ/mol
electron affinity
ionization energy
ionization energy of La (Lantani)
enthalpy of vaporization
402 kJ/mol
enthalpy of fusion
8.5 kJ/mol
standard enthalpy of formation
431 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 18, 9, 2
Bohr model: La (Lantani)
valence electron2
Lewis structure: La (Lantani)
trefn yr electronnau[Xe] 5d1 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 5d1 6s2
Enhanced Bohr model of La (Lantani)
Orbital Diagram of La (Lantani)
Cyflwr ocsidiad0, 1, 2, 3
Electronegatifedd
1.1
Electrophilicity Index
0.894990101871977 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
3,737.15 K
Melting Point
1,193.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Silver
appearancesilvery white
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
13.4 W/(m K)
thermal expansion
0.0000121 1/K
molar heat capacity
27.11 J/(mol K)
Specific Heat Capacity
0.195 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
dargludedd trydanol
1.6 MS/m
Gwrthedd
0.00000061 m Ω
superconductivity
4.88 K
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0.000000011 m³/Kg
magnetic susceptibility (Molar)
0.000000001528 m³/mol
magnetic susceptibility (Volume)
0.00006761
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureSimple Hexagonal (HEX)
lattice constant
3.75 Å
Lattice Anglesπ/2, π/2, 2 π/3
nodwedd mecanyddol deunyddiau
hardness
2.5 MPa
bulk modulus
28 GPa
shear modulus
14 GPa
Young's modulus
37 GPa
Poisson's ratio
0.28
speed of sound
2,475 m/s
classification
CategoryLanthanides, Lanthanides
CAS GroupIIIA
IUPAC GroupIIIB
Glawe Number32
Mendeleev Number13
Pettifor Number33
Geochemical Classrare earth & related
Goldschmidt classificationlitophile

other

Gas Basicity
991.9 kJ/mol
polarizability
215 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
8.98
Neutron Mass Absorption
0.0023
quantum number2D3/2
space group194 (P63/mmc)

Isotopes of Lanthanum

Stable Isotopes1
Unstable Isotopes41
Natural Isotopes2
Isotopic Composition13999.91%13999.91%1380.09%1380.09%

116La

Rhif màs116
neutron number59
relative atomic mass
115.957005 ± 0.000345 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin
nuclear quadrupole moment
dyddiad darganfod
parity

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

117La

Rhif màs117
neutron number60
relative atomic mass
116.950326 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
21.7 ± 1.8 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod2001
parity+

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

118La

Rhif màs118
neutron number61
relative atomic mass
117.946731 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1
nuclear quadrupole moment
dyddiad darganfod
parity-

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

119La

Rhif màs119
neutron number62
relative atomic mass
118.940934 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin11/2
nuclear quadrupole moment
dyddiad darganfod
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)

120La

Rhif màs120
neutron number63
relative atomic mass
119.938196 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.8 ± 0.2 s
spin1
nuclear quadrupole moment
dyddiad darganfod1984
parity-

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

121La

Rhif màs121
neutron number64
relative atomic mass
120.933236 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.3 ± 0.2 s
spin11/2
nuclear quadrupole moment
dyddiad darganfod1988
parity-

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

122La

Rhif màs122
neutron number65
relative atomic mass
121.93071 ± 0.00032 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
8.6 ± 0.5 s
spin1
nuclear quadrupole moment
dyddiad darganfod1984
parity-

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

123La

Rhif màs123
neutron number66
relative atomic mass
122.9263 ± 0.00021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17 ± 3 s
spin11/2
nuclear quadrupole moment
dyddiad darganfod1978
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

124La

Rhif màs124
neutron number67
relative atomic mass
123.924574275 ± 0.000060836 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
29.21 ± 0.17 s
spin7
nuclear quadrupole moment
dyddiad darganfod1978
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

125La

Rhif màs125
neutron number68
relative atomic mass
124.920815931 ± 0.000027909 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
64.8 ± 1.2 s
spin11/2
nuclear quadrupole moment
dyddiad darganfod1973
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

126La

Rhif màs126
neutron number69
relative atomic mass
125.919512667 ± 0.000097163 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
54 ± 2 s
spin5
nuclear quadrupole moment
dyddiad darganfod1961
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

127La

Rhif màs127
neutron number70
relative atomic mass
126.916375083 ± 0.000027912 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.1 ± 0.1 m
spin11/2
nuclear quadrupole moment
dyddiad darganfod1963
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

128La

Rhif màs128
neutron number71
relative atomic mass
127.915592123 ± 0.000058452 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.18 ± 0.14 m
spin5
nuclear quadrupole moment
dyddiad darganfod1961
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

129La

Rhif màs129
neutron number72
relative atomic mass
128.912695592 ± 0.000022913 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
11.6 ± 0.2 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1963
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

130La

Rhif màs130
neutron number73
relative atomic mass
129.912369413 ± 0.000027854 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
8.7 ± 0.1 m
spin3
nuclear quadrupole moment
dyddiad darganfod1961
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

131La

Rhif màs131
neutron number74
relative atomic mass
130.91007 ± 0.00003 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
59 ± 2 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1951
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

132La

Rhif màs132
neutron number75
relative atomic mass
131.910119047 ± 0.000039032 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.59 ± 0.04 h
spin2
nuclear quadrupole moment
dyddiad darganfod1951
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

133La

Rhif màs133
neutron number76
relative atomic mass
132.908218 ± 0.00003 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.912 ± 0.008 h
spin5/2
nuclear quadrupole moment
dyddiad darganfod1950
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

134La

Rhif màs134
neutron number77
relative atomic mass
133.908514011 ± 0.000021395 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
6.45 ± 0.16 m
spin1
nuclear quadrupole moment
dyddiad darganfod1951
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

135La

Rhif màs135
neutron number78
relative atomic mass
134.906984427 ± 0.000010126 Da
g-factor
1.48 ± 0.036
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
18.91 ± 0.02 h
spin5/2
nuclear quadrupole moment
-0.4 ± 0.4
dyddiad darganfod1948
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

136La

Rhif màs136
neutron number79
relative atomic mass
135.907634962 ± 0.000057081 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
9.87 ± 0.03 m
spin1
nuclear quadrupole moment
dyddiad darganfod1950
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

137La

Rhif màs137
neutron number80
relative atomic mass
136.906450438 ± 0.00000176 Da
g-factor
0.77028571428571 ± 0.0017142857142857
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
60 ± 20 ky
spin7/2
nuclear quadrupole moment
0.21 ± 0.04
dyddiad darganfod1948
parity+

decay modeintensity
ϵ (electron capture)100%

138La

Rhif màs138
neutron number81
relative atomic mass
137.907124041 ± 0.000000446 Da
g-factor
0.74168 ± 0.00004
natural abundance
0.08881 ± 0.00071
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
103 ± 1 Gy
spin5
nuclear quadrupole moment
0.39 ± 0.03
dyddiad darganfod1947
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)65.5%
β (β decay)34.5%

139La

Rhif màs139
neutron number82
relative atomic mass
138.906362927 ± 0.000000651 Da
g-factor
0.79402857142857 ± 0.000057142857142857
natural abundance
99.91119 ± 0.00071
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin7/2
nuclear quadrupole moment
0.206 ± 0.004
dyddiad darganfod1924
parity+

140La

Rhif màs140
neutron number83
relative atomic mass
139.909487285 ± 0.000000651 Da
g-factor
0.24333333333333 ± 0.005
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
40.289 ± 0.004 h
spin3
nuclear quadrupole moment
0.087 ± 0.013
dyddiad darganfod1935
parity-

decay modeintensity
β (β decay)100%

141La

Rhif màs141
neutron number84
relative atomic mass
140.910971155 ± 0.00000443 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.92 ± 0.03 h
spin7/2
nuclear quadrupole moment
dyddiad darganfod1951
parity+

decay modeintensity
β (β decay)100%

142La

Rhif màs142
neutron number85
relative atomic mass
141.91409076 ± 0.000006748 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
91.1 ± 0.5 m
spin2
nuclear quadrupole moment
dyddiad darganfod1953
parity-

decay modeintensity
β (β decay)100%

143La

Rhif màs143
neutron number86
relative atomic mass
142.916079482 ± 0.000007868 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
14.2 ± 0.1 m
spin7/2
nuclear quadrupole moment
dyddiad darganfod1951
parity

decay modeintensity
β (β decay)100%

144La

Rhif màs144
neutron number87
relative atomic mass
143.919645589 ± 0.000013888 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
44 ± 0.7 s
spin3
nuclear quadrupole moment
dyddiad darganfod1967
parity-

decay modeintensity
β (β decay)100%

145La

Rhif màs145
neutron number88
relative atomic mass
144.921808065 ± 0.00001317 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
24.8 ± 2 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1974
parity+

decay modeintensity
β (β decay)100%

146La

Rhif màs146
neutron number89
relative atomic mass
145.925688017 ± 0.000001797 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
9.9 ± 0.1 s
spin5
nuclear quadrupole moment
dyddiad darganfod1970
parity-

decay modeintensity
β (β decay)100%

147La

Rhif màs147
neutron number90
relative atomic mass
146.9284178 ± 0.0000115 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.026 ± 0.02 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1979
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.041%

148La

Rhif màs148
neutron number91
relative atomic mass
147.9326794 ± 0.0000209 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.414 ± 0.025 s
spin2
nuclear quadrupole moment
dyddiad darganfod1969
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.18%

149La

Rhif màs149
neutron number92
relative atomic mass
148.935351259 ± 0.00021499 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.071 ± 0.022 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod1979
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)1.43%

150La

Rhif màs150
neutron number93
relative atomic mass
149.9395475 ± 0.0000027 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
504 ± 15 ms
spin3
nuclear quadrupole moment
dyddiad darganfod1993
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)2.7%

151La

Rhif màs151
neutron number94
relative atomic mass
150.942769 ± 0.0004675 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
465 ± 24 ms
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1994
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)

152La

Rhif màs152
neutron number95
relative atomic mass
151.947085 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
287 ± 16 ms
spin2
nuclear quadrupole moment
dyddiad darganfod1994
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)

153La

Rhif màs153
neutron number96
relative atomic mass
152.950553 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
245 ± 18 ms
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1994
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

154La

Rhif màs154
neutron number97
relative atomic mass
153.955416 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
161 ± 15 ms
spin2
nuclear quadrupole moment
dyddiad darganfod2017
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

155La

Rhif màs155
neutron number98
relative atomic mass
154.95928 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
101 ± 28 ms
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod2016
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

156La

Rhif màs156
neutron number99
relative atomic mass
155.964519 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
84 ± 78 ms
spin4
nuclear quadrupole moment
dyddiad darganfod2017
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)

157La

Rhif màs157
neutron number100
relative atomic mass
156.968792 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod2018
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Lanthan 1-cropflipped

hanes

darganfyddwr neu ddyfeisiwrCarl Mosander
man darganfodSweden
dyddiad darganfod1839
geirdarddiadGreek: lanthanein (to be hidden).
ynganiadLAN-the-nem (Saesneg)

source

Abundance
Abundance in Earth's crust
natural abundance (cefnfor)
0.0000034 mg/L
natural abundance (corff dynol)
natural abundance (Awyrfaen)
0.000028 %
natural abundance (Haul)
0.0000002 %
Abundance in Universe
0.0000002 %

Nuclear Screening Constants

1s1.1317
2p4.2044
2s15.0466
3d13.9398
3p18.8604
3s19.0569
4d32.2748
4f55.64
4p29.2936
4s28.2036
5p41.104
5s39.189
6s47.688