|
Cerium
|
Ce
|
58
|
Lanthanide
|
the then recently discovered asteroid Ceres, considered a planet at the time
|
|
6
|
140.12
|
0.00
|
6.77
|
1068.00
|
3716.00
|
0.19
|
1.12
|
66.50
|
|
Praseodymium
|
Pr
|
59
|
Lanthanide
|
the Greek praseios didymos meaning 'green twin'
|
|
6
|
140.91
|
0.00
|
6.77
|
1208.00
|
3793.00
|
0.19
|
1.13
|
9.20
|
|
Neodymium
|
Nd
|
60
|
Lanthanide
|
the Greek neos didymos meaning 'new twin'
|
|
6
|
144.24
|
0.00
|
7.01
|
1297.00
|
3347.00
|
0.19
|
1.14
|
41.50
|
|
Samarium
|
Sm
|
62
|
Lanthanide
|
Samarskite, the name of the mineral from which it was first isolated
|
|
6
|
150.36
|
0.02
|
7.52
|
1345.00
|
2067.00
|
0.20
|
1.17
|
7.05
|
|
Europium
|
Eu
|
63
|
Lanthanide
|
Europe
|
|
6
|
151.96
|
0.00
|
5.24
|
1099.00
|
1802.00
|
0.18
|
1.20
|
2.00
|
|
Gadolinium
|
Gd
|
64
|
Lanthanide
|
Johan Gadolin, chemist, physicist and mineralogist
|
|
6
|
157.25
|
0.03
|
7.90
|
1585.00
|
3546.00
|
0.24
|
1.20
|
6.20
|
|
Terbium
|
Tb
|
65
|
Lanthanide
|
Ytterby, Sweden
|
|
6
|
158.93
|
0.00
|
8.23
|
1629.00
|
3503.00
|
0.18
|
1.20
|
1.20
|
|
Dysprosium
|
Dy
|
66
|
Lanthanide
|
the Greek dysprositos, 'hard to get'
|
|
6
|
162.50
|
0.00
|
8.55
|
1680.00
|
2840.00
|
0.17
|
1.22
|
5.20
|
|
Holmium
|
Ho
|
67
|
Lanthanide
|
Holmia, the New Latin name for Stockholm
|
|
6
|
164.93
|
0.00
|
8.80
|
1734.00
|
2993.00
|
0.17
|
1.23
|
1.30
|
|
Erbium
|
Er
|
68
|
Lanthanide
|
Ytterby, Sweden
|
|
6
|
167.26
|
0.00
|
9.07
|
1802.00
|
3141.00
|
0.17
|
1.24
|
3.50
|