Lantan

Lantan (La)

grundämne
Atomnummer57
Atommassa138.90547
masstal139
Grupp3
Period6
Blockd
Protoner57 p+
Neutroner82 n0
Electrons57 e-
Lanthan 1-cropflipped.jpg Animated Bohrs atommodell of La (Lantan) Enhanced Bohrs atommodell of La (Lantan) Bohrs atommodell: La (Lantan) Orbital Diagram of La (Lantan)

Egenskaper

atomradie
195 pm
molvolym
kovalent radie
180 pm
Metallic Radius
169 pm
ionic radius
103,2 pm
Crystal Radius
117,2 pm
Van der Waalsradie
243 pm
densitet
6,15 g/cm³
energi
proton affinity
1 013 kJ/mol
Elektronaffinitet
joniseringsenergi
ångbildningsvärme
402 kJ/mol
smältvärme
8,5 kJ/mol
Bildningsentalpi
431 kJ/mol
Electrons
electron shell2, 8, 18, 18, 9, 2
valenselektron3
elektronkonfiguration[Xe] 5d1 6s2
oxidationstal0, 1, 2, 3
elektronegativitet
1.1
Electrophilicity
0,894990101871977 eV/particle
Phases
aggregationstillståndFast
Gas Phase
Kokpunkt
3 737,15 K
Smältpunkt
1 193,15 K
critical pressure
critical temperature
trippelpunkt
Visual
färg
Silver
appearancesilvery white
Brytningsindex
materialegenskap
Värmeledningsförmåga
13,4 W/(m K)
termisk expansion
0,0000121 1/K
molar heat capacity
27,11 J/(mol K)
Specifik värmekapacitet
0,195 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
elektrisk konduktivitet
1,6 MS/m
resistivitet
0,00000061 m Ω
supraledare
4,88 K
magnetism
typeparamagnetic
magnetisk susceptibilitet (Mass)
0,000000011 m³/Kg
magnetisk susceptibilitet (Molar)
0,000000001528 m³/mol
magnetisk susceptibilitet (Volume)
0,00006761
magnetic ordering
Curiepunkten
Néel temperature
Structure
KristallstrukturEnkelt hexagonalt (HEX)
Gitterkonstant
3,75 Å
Lattice Anglesπ/2, π/2, 2 π/3
mekanisk materialegenskap
hårdhet
2,5 MPa
Kompressibilitet
28 GPa
skjuvmodul
14 GPa
Young's modulus
37 GPa
Poissons konstant
0,28
ljudhastighet
2 475 m/s
klassificering
KategoriLantanoider, Lanthanides
CAS GroupIIIA
IUPAC GroupIIIB
Glawe Number32
Mendeleev Number13
Pettifor Number33
Geochemical Classrare earth & related
Goldschmidt classificationlitophile
övrigt
Gas Basicity
991,9 kJ/mol
Dipole Polarizability
215 ± 20 a₀
C6 Dispersion Coefficient
Allotropes
Träffyta
8,98
Neutron Mass Absorption
0,0023
kvanttal2D3/2
rymdgrupp194 (P63/mmc)

Lantanisotoper

Stabila isotoper2
Instabila isotoper40
Radioactive Isotopes41

116La

natural abundanceRadioactive ☢️
relative atomic mass
115,957005 ± 0,000345 Da
masstal116
g-factor
Halveringstid
Spinn
nuclear quadrupole moment
upptäcktsdatum
Paritet

116La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
β+ p (β+-delayed proton emission)%
p (proton emission)%

117La

natural abundanceRadioactive ☢️
relative atomic mass
116,950326 ± 0,000215 Da
masstal117
g-factor
Halveringstid
21,7 ± 1,8 ms
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum2001
Paritet+

117La Decay Modes
decay modeIntensitet
p (proton emission)100%
β+ (β+ decay; β+ = ϵ + e+)%
β+ p (β+-delayed proton emission)%

118La

natural abundanceRadioactive ☢️
relative atomic mass
117,946731 ± 0,000322 Da
masstal118
g-factor
Halveringstid
Spinn1
nuclear quadrupole moment
upptäcktsdatum
Paritet-

118La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
β+ p (β+-delayed proton emission)%

119La

natural abundanceRadioactive ☢️
relative atomic mass
118,940934 ± 0,000322 Da
masstal119
g-factor
Halveringstid
Spinn11/2
nuclear quadrupole moment
upptäcktsdatum
Paritet-

119La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%

120La

natural abundanceRadioactive ☢️
relative atomic mass
119,938196 ± 0,000322 Da
masstal120
g-factor
Halveringstid
2,8 ± 0,2 s
Spinn1
nuclear quadrupole moment
upptäcktsdatum1984
Paritet-

120La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)%

121La

natural abundanceRadioactive ☢️
relative atomic mass
120,933236 ± 0,000322 Da
masstal121
g-factor
Halveringstid
5,3 ± 0,2 s
Spinn11/2
nuclear quadrupole moment
upptäcktsdatum1988
Paritet-

121La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)%

122La

natural abundanceRadioactive ☢️
relative atomic mass
121,93071 ± 0,00032 Da
masstal122
g-factor
Halveringstid
8,6 ± 0,5 s
Spinn1
nuclear quadrupole moment
upptäcktsdatum1984
Paritet-

122La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)%

123La

natural abundanceRadioactive ☢️
relative atomic mass
122,9263 ± 0,00021 Da
masstal123
g-factor
Halveringstid
17 ± 3 s
Spinn11/2
nuclear quadrupole moment
upptäcktsdatum1978
Paritet-

123La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

124La

natural abundanceRadioactive ☢️
relative atomic mass
123,924574275 ± 0,000060836 Da
masstal124
g-factor
Halveringstid
29,21 ± 0,17 s
Spinn7
nuclear quadrupole moment
upptäcktsdatum1978
Paritet

124La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

125La

natural abundanceRadioactive ☢️
relative atomic mass
124,920815931 ± 0,000027909 Da
masstal125
g-factor
Halveringstid
64,8 ± 1,2 s
Spinn11/2
nuclear quadrupole moment
upptäcktsdatum1973
Paritet-

125La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

126La

natural abundanceRadioactive ☢️
relative atomic mass
125,919512667 ± 0,000097163 Da
masstal126
g-factor
Halveringstid
54 ± 2 s
Spinn5
nuclear quadrupole moment
upptäcktsdatum1961
Paritet-

126La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

127La

natural abundanceRadioactive ☢️
relative atomic mass
126,916375083 ± 0,000027912 Da
masstal127
g-factor
Halveringstid
5,1 ± 0,1 m
Spinn11/2
nuclear quadrupole moment
upptäcktsdatum1963
Paritet-

127La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

128La

natural abundanceRadioactive ☢️
relative atomic mass
127,915592123 ± 0,000058452 Da
masstal128
g-factor
Halveringstid
5,18 ± 0,14 m
Spinn5
nuclear quadrupole moment
upptäcktsdatum1961
Paritet+

128La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

129La

natural abundanceRadioactive ☢️
relative atomic mass
128,912695592 ± 0,000022913 Da
masstal129
g-factor
Halveringstid
11,6 ± 0,2 m
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1963
Paritet+

129La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

130La

natural abundanceRadioactive ☢️
relative atomic mass
129,912369413 ± 0,000027854 Da
masstal130
g-factor
Halveringstid
8,7 ± 0,1 m
Spinn3
nuclear quadrupole moment
upptäcktsdatum1961
Paritet

130La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

131La

natural abundanceRadioactive ☢️
relative atomic mass
130,91007 ± 0,00003 Da
masstal131
g-factor
Halveringstid
59 ± 2 m
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1951
Paritet+

131La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

132La

natural abundanceRadioactive ☢️
relative atomic mass
131,910119047 ± 0,000039032 Da
masstal132
g-factor
Halveringstid
4,59 ± 0,04 h
Spinn2
nuclear quadrupole moment
upptäcktsdatum1951
Paritet-

132La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

133La

natural abundanceRadioactive ☢️
relative atomic mass
132,908218 ± 0,00003 Da
masstal133
g-factor
Halveringstid
3,912 ± 0,008 h
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1950
Paritet+

133La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

134La

natural abundanceRadioactive ☢️
relative atomic mass
133,908514011 ± 0,000021395 Da
masstal134
g-factor
Halveringstid
6,45 ± 0,16 m
Spinn1
nuclear quadrupole moment
upptäcktsdatum1951
Paritet+

134La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

135La

natural abundanceRadioactive ☢️
relative atomic mass
134,906984427 ± 0,000010126 Da
masstal135
g-factor
1,48 ± 0,036
Halveringstid
18,91 ± 0,02 h
Spinn5/2
nuclear quadrupole moment
−0,4 ± 0,4
upptäcktsdatum1948
Paritet+

135La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

136La

natural abundanceRadioactive ☢️
relative atomic mass
135,907634962 ± 0,000057081 Da
masstal136
g-factor
Halveringstid
9,87 ± 0,03 m
Spinn1
nuclear quadrupole moment
upptäcktsdatum1950
Paritet+

136La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

137La

natural abundanceRadioactive ☢️
relative atomic mass
136,906450438 ± 0,00000176 Da
masstal137
g-factor
0,77028571428571 ± 0,0017142857142857
Halveringstid
60 ± 20 ky
Spinn7/2
nuclear quadrupole moment
0,21 ± 0,04
upptäcktsdatum1948
Paritet+

137La Decay Modes
decay modeIntensitet
ϵ (electron capture)100%

138La

natural abundanceRadioactive ☢️
0,08881 ± 0,00071
relative atomic mass
137,907124041 ± 0,000000446 Da
masstal138
g-factor
0,74168 ± 0,00004
Halveringstid
103 ± 1 Gy
Spinn5
nuclear quadrupole moment
0,39 ± 0,03
upptäcktsdatum1947
Paritet+

138La Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)65.5%
β (β decay)34.5%

139La

natural abundance
99,91119 ± 0,00071
relative atomic mass
138,906362927 ± 0,000000651 Da
masstal139
g-factor
0,79402857142857 ± 0,000057142857142857
Halveringstid
Spinn7/2
nuclear quadrupole moment
0,206 ± 0,004
upptäcktsdatum1924
Paritet+

140La

natural abundanceRadioactive ☢️
relative atomic mass
139,909487285 ± 0,000000651 Da
masstal140
g-factor
0,24333333333333 ± 0,005
Halveringstid
40,289 ± 0,004 h
Spinn3
nuclear quadrupole moment
0,087 ± 0,013
upptäcktsdatum1935
Paritet-

140La Decay Modes
decay modeIntensitet
β (β decay)100%

141La

natural abundanceRadioactive ☢️
relative atomic mass
140,910971155 ± 0,00000443 Da
masstal141
g-factor
Halveringstid
3,92 ± 0,03 h
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1951
Paritet+

141La Decay Modes
decay modeIntensitet
β (β decay)100%

142La

natural abundanceRadioactive ☢️
relative atomic mass
141,91409076 ± 0,000006748 Da
masstal142
g-factor
Halveringstid
91,1 ± 0,5 m
Spinn2
nuclear quadrupole moment
upptäcktsdatum1953
Paritet-

142La Decay Modes
decay modeIntensitet
β (β decay)100%

143La

natural abundanceRadioactive ☢️
relative atomic mass
142,916079482 ± 0,000007868 Da
masstal143
g-factor
Halveringstid
14,2 ± 0,1 m
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1951
Paritet

143La Decay Modes
decay modeIntensitet
β (β decay)100%

144La

natural abundanceRadioactive ☢️
relative atomic mass
143,919645589 ± 0,000013888 Da
masstal144
g-factor
Halveringstid
44 ± 0,7 s
Spinn3
nuclear quadrupole moment
upptäcktsdatum1967
Paritet-

144La Decay Modes
decay modeIntensitet
β (β decay)100%

145La

natural abundanceRadioactive ☢️
relative atomic mass
144,921808065 ± 0,00001317 Da
masstal145
g-factor
Halveringstid
24,8 ± 2 s
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1974
Paritet+

145La Decay Modes
decay modeIntensitet
β (β decay)100%

146La

natural abundanceRadioactive ☢️
relative atomic mass
145,925688017 ± 0,000001797 Da
masstal146
g-factor
Halveringstid
9,9 ± 0,1 s
Spinn5
nuclear quadrupole moment
upptäcktsdatum1970
Paritet-

146La Decay Modes
decay modeIntensitet
β (β decay)100%

147La

natural abundanceRadioactive ☢️
relative atomic mass
146,9284178 ± 0,0000115 Da
masstal147
g-factor
Halveringstid
4,026 ± 0,02 s
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1979
Paritet+

147La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)0.041%

148La

natural abundanceRadioactive ☢️
relative atomic mass
147,9326794 ± 0,0000209 Da
masstal148
g-factor
Halveringstid
1,414 ± 0,025 s
Spinn2
nuclear quadrupole moment
upptäcktsdatum1969
Paritet-

148La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)0.18%

149La

natural abundanceRadioactive ☢️
relative atomic mass
148,935351259 ± 0,00021499 Da
masstal149
g-factor
Halveringstid
1,071 ± 0,022 s
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1979
Paritet-

149La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)1.43%

150La

natural abundanceRadioactive ☢️
relative atomic mass
149,9395475 ± 0,0000027 Da
masstal150
g-factor
Halveringstid
504 ± 15 ms
Spinn3
nuclear quadrupole moment
upptäcktsdatum1993
Paritet+

150La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)2.7%

151La

natural abundanceRadioactive ☢️
relative atomic mass
150,942769 ± 0,0004675 Da
masstal151
g-factor
Halveringstid
465 ± 24 ms
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1994
Paritet+

151La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

152La

natural abundanceRadioactive ☢️
relative atomic mass
151,947085 ± 0,000322 Da
masstal152
g-factor
Halveringstid
287 ± 16 ms
Spinn2
nuclear quadrupole moment
upptäcktsdatum1994
Paritet-

152La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

153La

natural abundanceRadioactive ☢️
relative atomic mass
152,950553 ± 0,000322 Da
masstal153
g-factor
Halveringstid
245 ± 18 ms
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1994
Paritet+

153La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%
2n (2-neutron emission)%

154La

natural abundanceRadioactive ☢️
relative atomic mass
153,955416 ± 0,000322 Da
masstal154
g-factor
Halveringstid
161 ± 15 ms
Spinn2
nuclear quadrupole moment
upptäcktsdatum2017
Paritet-

154La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%
2n (2-neutron emission)%

155La

natural abundanceRadioactive ☢️
relative atomic mass
154,95928 ± 0,000429 Da
masstal155
g-factor
Halveringstid
101 ± 28 ms
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum2016
Paritet+

155La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%
2n (2-neutron emission)%

156La

natural abundanceRadioactive ☢️
relative atomic mass
155,964519 ± 0,000429 Da
masstal156
g-factor
Halveringstid
84 ± 78 ms
Spinn4
nuclear quadrupole moment
upptäcktsdatum2017
Paritet+

156La Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

157La

natural abundanceRadioactive ☢️
relative atomic mass
156,968792 ± 0,000322 Da
masstal157
g-factor
Halveringstid
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum2018
Paritet+

157La Decay Modes
decay modeIntensitet
β (β decay)%
β n (β-delayed neutron emission)%

historia

upptäckare eller uppfinnareCarl Mosander
fyndplatsSweden
upptäcktsdatum1839
etymologiGreek: lanthanein (to be hidden).
uttalLAN-the-nem (engelska)

Sources

Förekomst
Abundance in Earth's crust
Abundance in Oceans
0,0000034 mg/L
Abundance in Human Body
Abundance in Meteor
0,000028 %
Abundance in Sun
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