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Properties of substance:
tungsten
Group of substances:
inorganic
Physical appearance:
cubic metal
Empirical formula (Hill's system for organic substances):
W
Structural formula as text:
W
Molar/atomic mass: 183.85
Melting point (°C):
3420
Boiling point (°C):
5680
Solubility (g/100 g of solvent):
mercury
: 0.00001 (25°C) [
Ref.
]
water
: insoluble [
Ref.
]
Numerical data:
Year of discovery: 1781
Superconducting temperature (K): 0.015
Density:
19.32 (20°C, g/cm
3
)
Reactions:
[
Ref.1
]
W + 3F
2
→ WF
6
Half-life:
157
74
W = 275 ms (β
+
(100%))
158
74
W = 1.25 ms (α (100%))
158m
74
W = 143 μs (α (100%))
159
74
W = 8.2 ms (α (82%))
160
74
W = 90 ms (α (87%))
161
74
W = 409 ms (α (73%), β
+
(27%))
162
74
W = 1.19 s (α (45.2%))
163
74
W = 2.63 s (α (14%))
163m
74
W = 154 ns (internal transition (100%))
164
74
W = 6.3 s (β
+
(96.2%), α (3.8%))
165
74
W = 5.1 s (β
+
(about 100%), α (< 0.2%))
166
74
W = 19.2 s (β
+
(about 100%), α (0.035%))
167
74
W = 19.9 s (β
+
(99.96%), α (0.04%))
168
74
W = 50.9 s (β
+
(about 100%), α (0.0032%))
169
74
W = 74 s (β
+
(100%))
170
74
W = 2.42 min (β
+
(about 100%))
171
74
W = 2.38 min (β
+
(100%))
172
74
W = 6.6 min (β
+
(100%))
173
74
W = 7.6 min (β
+
(100%))
174
74
W = 33.2 min (β
+
(100%))
174n
74
W = 187 ns (internal transition (100%))
174p
74
W = 158 ns (internal transition (100%))
174q
74
W = 128 ns (internal transition (100%))
175
74
W = 35.2 min (β
+
(100%))
175m
74
W = 216 ns (internal transition (100%))
176
74
W = 2.5 h (electron capture (100%))
177
74
W = 132 min (β
+
(100%))
178
74
W = 21.6 d (electron capture (100%))
178m
74
W = 220 ns (internal transition (100%))
179
74
W = 37.05 min (β
+
(100%))
179m
74
W = 6.40 min (internal transition (about 100%), β
+
(0.29%))
179n
74
W = 390 ns (internal transition (100%))
179p
74
W = 750 ns (internal transition (100%))
180
74
W = 1.8 · 10
19
y (α (about 100%) (isotopic abundance 0,12%))
180m
74
W = 5.47 ms (internal transition (100%))
180n
74
W = 2.3 μs (internal transition (100%))
181
74
W = 121.2 d (electron capture (100%))
181m
74
W = 14.59 μs (internal transition (100%))
181n
74
W = 140 ns (internal transition (100%))
182
74
W = stable ( (isotopic abundance 26,5%))
182m
74
W = 1.3 μs (internal transition (100%))
183
74
W = stable ( (isotopic abundance 14,31%))
183m
74
W = 5.3 s (internal transition (100%))
184
74
W = stable ( (isotopic abundance 30,64%))
184m
74
W = 8.33 μs (internal transition (100%))
184n
74
W = 188 ns (internal transition (100%))
185
74
W = 75.1 d (β
-
(100%))
185m
74
W = 1.597 min (internal transition (100%))
186
74
W = stable ( (isotopic abundance 28,43%))
186m
74
W = 18 μs (internal transition (100%))
186n
74
W = 2.0 s (internal transition (100%))
187
74
W = 24.000 h (β
-
(100%))
187m
74
W = 1.38 μs (internal transition (100%))
188
74
W = 69.78 d (β
-
(100%))
188m
74
W = 109.5 ns (internal transition (100%))
189
74
W = 10.7 min (β
-
(100%))
190
74
W = 30.0 min (β
-
(100%))
190m
74
W = 111 ns (internal transition (100%))
190n
74
W = 166 μs (internal transition (100%))
Vapour pressure (Torr):
0.0000000079 (2130°C)
0.0000655 (2730°C)
0.01 (3230°C)
0.1 (3525°C)
1 (3875°C)
10 (4295°C)
100 (4810°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)):
32.7 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
24.3 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
61.5
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
769
References:
Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 3.57
Бусев А.И., Иванов В.М., Соколова Т.А. Аналитическая химия вольфрама. - М.: Наука, 1976. - pp. 9-11 [Russian]
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 49-50 [Russian]
Зеликман А.Н., Никитина Л.С. Вольфрам. - М.: Металлургия, 1978. - pp. 17-31 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 59 [Russian]
Редкие и рассеянные элементы. Химия и технология. - Кн. 2. - М.: Мисис, 1998. - pp. 368-373 [Russian]
Фторидный процесс получения вольфрама. - М.: Наука, 1981. - pp. 5-27 [Russian]
Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 418-420 [Russian]
Химия и технология редких и рассеянных элементов. - Ч. 3. - М.: Высшая школа, 1976. - pp. 222-223 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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