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Properties of substance:
platinum
Group of substances:
inorganic
Physical appearance:
cubic metal
Empirical formula (Hill's system for organic substances):
Pt
Structural formula as text:
Pt
Molar/atomic mass: 195.09
Melting point (°C):
1769
Boiling point (°C):
3800
Solubility (g/100 g of solvent):
gallium
: 4 (500°C) [
Ref.
]
mercury
: 0.0001 (20°C) [
Ref.
]
water
: insoluble [
Ref.
]
Density:
21.45 (20°C, g/cm
3
)
Reactions:
Yeild 75%. [
Ref.1
]
Pt + 3F
2
→ PtF
6
[
Ref.1
]
Pt + 3F
2
→ PtF
6
Half-life:
166
78
Pt = 300 μs (α (100%))
167
78
Pt = 800 μs (α (100%))
168
78
Pt = 2.02 ms (α (about 100%))
169
78
Pt = 6.99 ms ()
170
78
Pt = 13.93 ms ()
171
78
Pt = 45.5 ms (α (90%))
171m
78
Pt = 901 ns (internal transition (100%))
172
78
Pt = 97.6 ms (α (97%))
173
78
Pt = 382 ms (α (86%))
174
78
Pt = 889 ms (α (76%))
175
78
Pt = 2.43 s (α (64%))
176
78
Pt = 6.33 s (α (40%))
177
78
Pt = 10.6 s (β
+
(94.3%), α (5.7%))
177m
78
Pt = 2.2 μs (internal transition (100%))
178
78
Pt = 20.7 s (β
+
(92.3%), α (7.7%))
179
78
Pt = 21.2 s (β
+
(about 100%), α (0.24%))
180
78
Pt = 56 s (β
+
(about 100%), α (0.3%))
181
78
Pt = 52.0 s (β
+
(about 100%), α (0.074%))
182
78
Pt = 2.67 min (β
+
(about 100%), α (0.038%))
183
78
Pt = 6.5 min (β
+
(about 100%), α (0.0096%))
183m
78
Pt = 43 s (β
+
(about 100%), internal transition (3.1%), α)
184
78
Pt = 17.3 min (β
+
(about 100%), α (0.0017%))
184m
78
Pt = 1.01 ms (internal transition (100%))
185
78
Pt = 70.9 min (β
+
(about 100%), α (0.0050%))
185m
78
Pt = 33.0 min ()
185n
78
Pt = 728 ns (internal transition (100%))
186
78
Pt = 2.08 h (β
+
(about 100%), α (about 0.00014%))
187
78
Pt = 2.35 h (β
+
(100%))
187m
78
Pt = 311 μs (internal transition (100%))
188
78
Pt = 10.2 d (electron capture (100%), α (0.000026%))
189
78
Pt = 10.87 h (β
+
(100%))
189m
78
Pt = 464 ns (internal transition (100%))
189n
78
Pt = 143 μs (internal transition (100%))
190
78
Pt = 650 000 000 000 y (α (100%) (isotopic abundance 0,012%))
191
78
Pt = 2.83 d (electron capture (100%))
191n
78
Pt = 95 μs (internal transition (100%))
192
78
Pt = stable ( (isotopic abundance 0,782%))
192m
78
Pt = 272 ns (internal transition (100%))
193
78
Pt = 50 y (electron capture (100%))
193m
78
Pt = 4.33 d (internal transition (100%))
194
78
Pt = stable ( (isotopic abundance 32,86%))
195
78
Pt = stable ( (isotopic abundance 33,78%))
195m
78
Pt = 4.010 d (internal transition (100%))
196
78
Pt = stable ( (isotopic abundance 25,21%))
197
78
Pt = 19.8915 hasа (β
-
(100%))
197m
78
Pt = 95.41 min (internal transition (96.7%), β
+
(3.3%))
198
78
Pt = stable ( (isotopic abundance 7,36%))
199
78
Pt = 30.80 min (β
-
(100%))
199m
78
Pt = 13.6 s (internal transition (100%))
200
78
Pt = 12.6 h (β
-
(100%))
201
78
Pt = 2.5 min (β
-
(100%))
202
78
Pt = 44 h (β
-
(100%))
202m
78
Pt = 141 μs (internal transition (about 100%))
203
78
Pt = 22 s (β
-
(100%))
203m
78
Pt = 641 ns (internal transition (100%))
204
78
Pt = 10.3 s (β
-
(100%))
204m
78
Pt = 5.5 μs (internal transition (100%))
204n
78
Pt = 55 μs ()
204p
78
Pt = 146 ns (internal transition (100%))
Vapour pressure (Torr):
0.01 (2049°C)
0.1 (2270°C)
1 (2530°C)
10 (2860°C)
100 (3270°C)
Electrode potential:
Pt
2+
+ e
-
→ Pt, E = 1.188 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)):
41.5 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
25.9 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
19.7
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
510.4
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
566 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
192.3 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
25.5 (g)
References:
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
Левингстон С. Химия рутения, родия, палладия, осмия, иридия, платины. - М.: Мир, 1978 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 90 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 638 [Russian]
Токсикологическая химия. - Под ред. Плетеневой Т.В. - М.: ГЭОТАР-Медиа, 2005. - pp. 387 [Russian]
Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 568-569 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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