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Properties of substance:
strontium
Group of substances:
inorganic
Physical appearance:
cubic metal
Empirical formula (Hill's system for organic substances):
Sr
Structural formula as text:
Sr
Molar/atomic mass: 87.62
Melting point (°C):
768
Boiling point (°C):
1390
Solubility (g/100 g of solvent):
ammonia liquid
: 98 (-33.4°C) [
Ref.
]
mercury
: 0.74 (0°C) [
Ref.
]
mercury
: 1.05 (20°C) [
Ref.
]
mercury
: 1.13 (23°C) [
Ref.
]
mercury
: 1.27 (30°C) [
Ref.
]
mercury
: 1.82 (64.5°C) [
Ref.
]
strontium chloride fused
: 15.3 (1000°C) [
Ref.
]
water
: reaction [
Ref.
]
Numerical data:
Year of discovery: 1808
Density:
2.63 (20°C, g/cm
3
)
Half-life:
100
38
Sr = 202 ms (β
-
(100%), β
-
n (0.78%))
101
38
Sr = 113.8 ms (β
-
(100%), β
-
n (2.37%))
102
38
Sr = 69 ms (β
-
(100%), β
-
n (5.5%))
103
38
Sr = 53 ms (β
-
(100%), β
-
n )
104
38
Sr = 50.6 ms (β
-
(100%), β
-
n )
105
38
Sr = 39 ms (β
-
(100%), β
-
n )
106
38
Sr = 21 ms (β
-
(100%), β
-
n)
74
38
Sr = 27 ms (β
+
(100%))
75
38
Sr = 88 ms (β
+
(100%), β
+
p (5.2%))
76
38
Sr = 7.89 s (β
+
(100%), β
+
p (0.000034%))
77
38
Sr = 9.0 s (β
+
(100%), β
+
p (0.08%))
78
38
Sr = 156.1 s (β
+
(100%))
79
38
Sr = 2.25 min (β
+
(100%))
80
38
Sr = 106.3 min (β
+
(100%))
81
38
Sr = 22.3 min (β
+
(100%))
81m
38
Sr = 390 ns (internal transition (100%))
81n
38
Sr = 6.4 μs ()
82
38
Sr = 25.36 d (electron capture (100%))
83
38
Sr = 32.41 h (β
+
(100%))
84
38
Sr = stable ( (isotopic abundance 0,56%))
85
38
Sr = 64.853 d (electron capture (100%))
85m
38
Sr = 67.63 min (internal transition (86.6%), β
+
(13.4%))
86
38
Sr = stable ( (isotopic abundance 9,86%))
86m
38
Sr = 455 ns (internal transition (100%))
87
38
Sr = stable ( (isotopic abundance 7%))
87m
38
Sr = 2.815 h (internal transition (about 100%), electron capture (0.30%))
88
38
Sr = stable ( (isotopic abundance 82,58%))
89
38
Sr = 50.53 d (β
-
(100%))
90
38
Sr = 28.79 y (β
-
(100%))
91
38
Sr = 9.65 h (β
-
(100%))
92
38
Sr = 2.611 h (β
-
(100%))
93
38
Sr = 7.43 min (β
-
(100%))
94
38
Sr = 75.3 s (β
-
(100%))
95
38
Sr = 23.90 s (β
-
(100%))
96
38
Sr = 1.07 s (β
-
(100%))
97
38
Sr = 429 ms (β
-
(100%))
98
38
Sr = 653 ms (β
-
(100%), β
-
n (0.25%))
99
38
Sr = 269 ms (β
-
(100%), β
-
n (0.10%))
Vapour pressure (Torr):
0.01 (533°C)
0.1 (621°C)
1 (733°C)
10 (877°C)
100 (1097°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)):
53.1 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
27.2 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
9.2
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
141.4
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
161 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
164.5 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
20.8 (g)
References:
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
Карапетьянц М.Х., Дракин С.И. Общая и неорганическая химия. - М.: Химия, 1981. - pp. 309-316 [Russian]
Полуэктов Н.С., Мищенко В.Т., Кононенко Л.И., Бельтюкова С.В. Аналитическая химия стронция. - М.: Наука, 1978. - pp. 13-14 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 99 [Russian]
Энциклопедия для детей. - Т.17: Химия. - М.: Аванта+, 2004. - pp. 195 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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