Y - Yttrium

Although a period 5 transition metal, yttrium is associated with the rare earths. J. Gadolin discovered yttria mineral in 1794, proposing it as a new metal's oxide. A mixture of the reduced metals was obtained by Wöhler in 1828. In 1843 C. G. Mosander separated yttria into oxides of three metals, which were named yttrium, erbium and terbium, as they were found in a quarry near Ytterby, Sweden. Yttrium is used in color phosphors, lasers, ceramic superconductors and has been found in relatively high concentrations in lunar samples.

Atomic number - 39 Density g/mL 4 .5
Atomic weight u 88 .9059 Melting point K 1799
Bonding radius A 1 .62 Boiling point K 3611
Atomic radius A 2 .27 Heat of vaporization kJ/mol 363
Ionization Potential V 6 .38 Heat of fusion kJ/mol 11 .4
Electronegativity - 1 .22 Specific heat J/gK 0 .3
The oxide is a weak base.
Crystal are hexagonal.

Electron config. : [Kr] 4d1 5s2


Isotopes of Y: Click mass number for decay process, product for element page.


079
14.8 sec
EC/ECp,7.100
Sr-79/Rb-78
78.937305
080
35 sec
EC,9.100 MeV
Sr-80
79.934299
081
70.4 sec
EC,5.510 MeV
Sr-81
80.929124
082
9.5 sec
EC,7.820 MeV
Sr-82
81.926795
083
7.08 min
EC,4.470 MeV
Sr-83
82.922350
084
4.6 sec
EC,6.410 MeV
Sr-84
83.920310
085
2.68 hr
EC,3.250 MeV
Sr-85
84.916424
086
14.74 hr
EC,5.240 MeV
Sr-86
85.914890
087
79.8 hr
EC,1.862 MeV
Sr-87
86.910877
088
106.65 da
EC,3.623 MeV
Sr-88
87.909505
089 100%

Stable

88.905847
090
64.10 hr
B-,2.282 MeV
Zr-90
89.907152
091
58.51 da
B-,1.544 MeV
Zr-91
90.907300
091a
49.71 min
B-,2.100 MeV
Zr-91
90.907897
092
3.54 hr
B-,3.639 MeV
Zr-92
91.908947
093
10.18 hr
B-,2.893 MeV
Zr-93
92.909581
094
18.7 min
B-,4.919 MeV
Zr-94
93.911595
095
10.3 min
B-,4.420 MeV
Zr-95
94.912786
096
5.34 sec
B-,7.087 MeV
Zr-96
95.915882
097
3.75 sec
B-/B-n,6.688
Zr-97/Zr-96
96.918129
097a
142 msec
B-,10.211 MeV
Zr-97
96.921911
098
0.548 sec
B-/B-n,8.830
Zr-98/Zr-97
97.922236
099
1.470 sec
B-/B-n,7.567
Zr-99/Zr-98
98.924632
100
735 msec
B-/B-n,9.310
Zr-100/Zr-99
99.927750
100a
0.94 sec
B-,9.310 MeV
Zr-100
99.927750
101
448 msec
B-/B-n,8.550
Zr-101/Zr-100
100.93031
102
0.30 sec
B-,9.850 MeV
Zr-102
101.93355
104
150 nsec
B-,11.800 MeV
Zr-104
103.94149
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass