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Properties of substance:
dysprosium
Group of substances:
inorganic
Physical appearance:
gray hexagonal metal
Empirical formula (Hill's system for organic substances):
Dy
Structural formula as text:
Dy
Molar/atomic mass: 162.5
Melting point (°C):
1409
Boiling point (°C):
2600
Solubility (g/100 g of solvent):
water
: reaction [
Ref.
]
Numerical data:
Year of discovery: 1886
Density:
8.56 (20°C, g/cm
3
)
Half-life:
139
66
Dy = 600 ms (β
+
(100%), β
+
p (?))
140m
66
Dy = 7.0 μs (internal transition (100%))
141
66
Dy = 900 ms (β
+
(100%), β
+
p (?))
142
66
Dy = 2.3 s (β
+
(100%), β
+
p (0.06%))
143
66
Dy = 5.6 s (β
+
(100%), β
+
p (?))
143m
66
Dy = 3.0 s (β
+
(100%), β
+
p (?))
143n
66
Dy = 1.2 μs (internal transition (100%))
144
66
Dy = 9.1 s (β
+
(100%), β
+
p (?))
145
66
Dy = 9.5 s (β
+
(100%), β
+
p (?))
145m
66
Dy = 14.1 s (β
+
(100%), β
+
p (about 50%))
146
66
Dy = 33.2 s (β
+
(100%))
146m
66
Dy = 150 ms (internal transition (100%))
147
66
Dy = 67 s (β
+
(100%), β
+
p (about 0.05%))
147m
66
Dy = 55.2 s (β
+
(68.9%), internal transition (31.1%))
147n
66
Dy = 400 ns (internal transition (100%))
148
66
Dy = 3.3 min (β
+
(100%))
148m
66
Dy = 471 ns (internal transition (100%))
149
66
Dy = 4.20 min (β
+
(100%))
149m
66
Dy = 490 ms (internal transition (99.3%), β
+
(0.7%))
150
66
Dy = 7.17 min (β
+
(64%), α (36%))
151
66
Dy = 17.9 min (β
+
(?), α (5.6%))
152
66
Dy = 2.36 h (electron capture (about 100%), α (0.100%))
153
66
Dy = 6.4 h (β
+
(about 100%), α (0.0094%))
154
66
Dy = 3 000 000 y (α (100%))
155
66
Dy = 9.9 h (β
+
(100%))
155m
66
Dy = 6 μs (internal transition (100%))
156
66
Dy = stable ( (isotopic abundance 0,056%))
157
66
Dy = 8.14 h (β
+
(100%))
157m
66
Dy = 1.3 μs (internal transition (100%))
157n
66
Dy = 21.6 ms (internal transition (100%))
158
66
Dy = stable ( (isotopic abundance 0,095%))
159
66
Dy = 144.4 d (electron capture (100%))
159m
66
Dy = 122 μs (internal transition (100%))
160
66
Dy = stable ( (isotopic abundance 2,329%))
161
66
Dy = stable ( (isotopic abundance 18,889%))
161m
66
Dy = 760 ns (internal transition (100%))
162
66
Dy = stable ( (isotopic abundance 25,475%))
162m
66
Dy = 8.3 μs (internal transition (100%))
163
66
Dy = stable ( (isotopic abundance 24,896%))
164
66
Dy = stable ( (isotopic abundance 28,26%))
165
66
Dy = 2.334 h (β
-
(100%))
165m
66
Dy = 1.257 min (internal transition (97.76%), β
-
(2.24%))
166
66
Dy = 81.6 h (β
-
(100%))
167
66
Dy = 6.20 min (β
-
(100%))
168
66
Dy = 8.7 min (β
-
(100%))
169
66
Dy = 39 s (β
-
(100%))
170
66
Dy = 54.9 s (β
-
(100%))
170m
66
Dy = 940 ns (internal transition (100%))
171
66
Dy = 4.07 s (β
-
(100%))
172
66
Dy = 3.4 s (β
-
(100%))
172m
66
Dy = 710 ms (internal transition (81%), β
-
(19%))
173
66
Dy = 1.43 s (β
-
(100%))
Electrode potential:
Dy
3+
+ 3e
-
→ Dy, E = -2.353 V (water, 25°C)
Dy
4+
+ e
-
→ Dy
3+
, E = 5.4 V (water, 25°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
0 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
0 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
74.9 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
28 (s)
References:
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 50 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 62 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 82-83 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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