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Properties of substance:
ytterbium
Group of substances:
inorganic
Physical appearance:
cubic metal
Empirical formula (Hill's system for organic substances):
Yb
Structural formula as text:
Yb
Molar/atomic mass: 173.04
Melting point (°C):
824
Boiling point (°C):
1211
Solubility (g/100 g of solvent):
ammonia liquid
: 193.5 (-33.4°C) [
Ref.
]
mercury
: 0.09 (20°C) [
Ref.
]
water
: reaction [
Ref.
]
Numerical data:
Year of discovery: 1878
Density:
6.95 (20°C, g/cm
3
)
Half-life:
149
70
Yb = 700 ms (β
+
(100%), β
+
p (about 100%))
151
70
Yb = 1.6 s (β
+
(100%), β
+
p (?))
151m
70
Yb = 1.6 s (β
+
(about 100%), β
+
p (?))
151n
70
Yb = 2.6 μs (internal transition (100%))
151p
70
Yb = 20 μs (internal transition (100%))
152
70
Yb = 3.03 s (β
+
(100%))
152m
70
Yb = 30 μs (internal transition (100%))
153
70
Yb = 4.2 s ()
153m
70
Yb = 15 μs (internal transition (100%))
154
70
Yb = 409 ms (α (92.6%), β
+
(7.4%))
155
70
Yb = 1.793 s (α (89%), β
+
(11%))
156
70
Yb = 26.1 s (β
+
(90%), α (10%))
157
70
Yb = 38.6 s (β
+
(99.5%), α (0.5%))
158
70
Yb = 1.49 min (β
+
(about 100%), α (0.0021%))
159
70
Yb = 1.67 min (β
+
(100%))
160
70
Yb = 4.8 min (β
+
(100%))
161
70
Yb = 4.2 min (β
+
(100%))
162
70
Yb = 18.87 min (β
+
(100%))
163
70
Yb = 11.05 min (β
+
(100%))
164
70
Yb = 75.8 min (electron capture (100%))
165
70
Yb = 9.9 min (β
+
(100%))
165m
70
Yb = 300 ns (internal transition (100%))
166
70
Yb = 56.7 h (electron capture (100%))
167
70
Yb = 17.5 min (β
+
(100%))
167m
70
Yb = 180 ns (internal transition (100%))
168
70
Yb = stable ( (isotopic abundance 0,123%))
169
70
Yb = 32.018 d (electron capture (100%))
169m
70
Yb = 46 s (internal transition (100%))
170
70
Yb = stable ( (isotopic abundance 2,982%))
170m
70
Yb = 370 ns (internal transition (100%))
171
70
Yb = stable ( (isotopic abundance 14,09%))
171m
70
Yb = 5.25 ms (internal transition (100%))
171n
70
Yb = 265 ns (internal transition (100%))
172
70
Yb = stable ( (isotopic abundance 21,68%))
172m
70
Yb = 3.6 μs (internal transition (100%))
173
70
Yb = stable ( (isotopic abundance 16,103%))
173m
70
Yb = 2.9 μs (internal transition (100%))
174
70
Yb = stable ( (isotopic abundance 32,026%))
174m
70
Yb = 830 μs (internal transition (100%))
174n
70
Yb = 256 ns (internal transition (100%))
175
70
Yb = 4.185 d (β
-
(100%))
175m
70
Yb = 68.2 ms (internal transition (100%))
176
70
Yb = stable ( (isotopic abundance 12,996%))
176m
70
Yb = 11.4 s ()
177
70
Yb = 1.911 h (β
-
(100%))
177m
70
Yb = 6.41 s (internal transition (100%))
178
70
Yb = 74 min (β
-
(100%))
179
70
Yb = 8.0 min (β
-
(100%))
180
70
Yb = 2.4 min (β
-
(100%))
Vapour pressure (Torr):
0.01 (557°C)
0.1 (647°C)
1 (759°C)
10 (1121°C)
100 (1387°C)
Electrode potential:
Yb
3+
+ 3e
-
→ Yb
2+
, E = -1.205 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)):
62.76 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
25.1 (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. 66 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 276-277 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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