Mendeleev's Periodic Table > Dy - Dysprosium

Dy - Dysprosium

The rare earth metal dysprosium was discovered by de Boisbaudrain in 1886. Dysprosium is a component of glass blowers specticles. The element has a metallic, bright silver lustre. It is relatively stable in air at room temperature, but dissolves readily, with the evolution of hydrogen, in mineral acids. The Dysprosium metal is soft enough to be cut with a knife and can be machined without sparking if overheating is avoided.

Atomic number	-	66		Density	g/mL	8	.54
Atomic weight	u	162	.5	Melting point	K	1682
Bonding radius	A	1	.59	Boiling point	K	2835
Atomic radius	A	2	.49	Heat of vaporization	kJ/mol	230
Ionization Potential	V	5	.94	Heat of fusion	kJ/mol	11	.06
Electronegativity	-	1	.22	Specific heat	J/gK	0	.17
The oxide is weak base.				Crystal are hexagonal.
Electron config. : [Xe] 4f¹⁰ 6s²

Isotopes of Dy (Dysprosium):

MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	141 0.9 sec EC/ECp,9.300 Tb-141/Gd-140 140.95115	142 2.3 sec EC/ECp,6.900 Tb-142/Gd-141 141.94610	143 3.9 sec EC/ECp,8.800 Tb-143/Gd-142 142.94396	144 9.1 sec EC/ECp,6.200 Tb-144/Gd-143 143.93902
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	145 10.5 sec EC,7.720 MeV Tb-145 144.93696	146 33.2 sec EC,5.160 MeV Tb-146 145.93251	147 40 sec EC/ECp,6.370 Tb-147/Gd-146 146.93088	148 3.1 min EC,2.678 MeV Tb-148 147.92709
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	149 4.20 min EC,3.812 MeV Tb-149 148.92733	150 7.17 min a/EC,1.794 Gd-146/Tb-150 149.92557	151 17.9 min a/EC,2.870 Gd-147/Tb-151 150.92617	152 2.38 hr a/EC,4.492 Gd-148/Tb-152 151.92471
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	153 6.4 hr a/EC,2.170 Gd-149/Tb-153 152.92576	154 3.0E+6 yr a,2.947 MeV Gd-150 153.92442	155 9.9 hr EC,2.095 MeV Tb-155 154.92574	156 0.06% Stable 155.92427
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	157 8.14 hr EC,1.341 MeV Tb-157 156.92546	158 0.10% Stable 157.92440	159 144.4 da EC,2.514 MeV Tb-159 158.92573	160 2.34% Stable 159.92519
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	161 18.9% Stable 160.92692	162 25.5% Stable 161.92679	163 24.9% Stable 162.92872	164 28.2% Stable 163.92917
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	165 2.334 hr B-,1.286 MeV Ho-165 164.93170	166 81.6 hr B-,3.920 MeV Ho-166 165.93280	167 6.20 min B-,2.350 MeV Ho-167 166.93565	168 8.7 min B-,1.600 MeV Ho-168 167.93719
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	169 39 sec B-,3.200 MeV Ho-169 168.94031

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