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Properties of substance:
manganese
Group of substances:
inorganic
Physical appearance:
cubic metal
Empirical formula (Hill's system for organic substances):
Mn
Structural formula as text:
Mn
Molar/atomic mass: 54.94
Melting point (°C):
1245
Boiling point (°C):
2080
Solubility (g/100 g of solvent):
hydrazine
: insoluble [
Ref.
]
magnesium fused
: 2.15 (670°C) [
Ref.
]
magnesium fused
: 2.65 (710°C) [
Ref.
]
magnesium fused
: 3.21 (760°C) [
Ref.
]
magnesium fused
: 5.21 (850°C) [
Ref.
]
mercury
: 0.00025 (18°C) [
Ref.
]
water
: insoluble [
Ref.
]
Numerical data:
Year of discovery: 1774
Hardness on the Mohs’ scale: 5
Density:
7.44 (20°C, g/cm
3
)
Half-life:
46
25
Mn = 36.2 ms (β
+
(100%), β
-
p (57%))
47
25
Mn = 88.0 ms (β
+
(100%))
48
25
Mn = 158.1 ms (β
+
(100%), β
+
p (0.28%))
49
25
Mn = 382 ms (β
+
(100%))
50
25
Mn = 283.19 ms (β
+
(100%))
50m
25
Mn = 1.75 min (β
+
(100%))
51
25
Mn = 46.2 min (β
+
(100%))
52
25
Mn = 5.591 d (β
+
(100%))
52m
25
Mn = 21.1 min (β
+
(98.25%), internal transition (1.25%))
53
25
Mn = 3 700 000 y (electron capture (100%))
54
25
Mn = 312.05 d (electron capture (100%))
55
25
Mn = stable ( (isotopic abundance 100%))
56
25
Mn = 2.5789 hasа (β
-
(100%))
57
25
Mn = 85.4 s (β
-
(100%))
58
25
Mn = 3.0 s (β
-
(100%))
59
25
Mn = 4.59 s (β
-
(100%))
60
25
Mn = 280 ms (β
-
(100%))
60m
25
Mn = 1.77 s (β
-
(88.5%), internal transition (11.5%))
61
25
Mn = 670 ms (β
-
(100%))
62
25
Mn = 92 ms (β
-
(100%))
62m
25
Mn = 671 ms (β
-
(100%))
63
25
Mn = 275 ms (β
-
(100%))
64
25
Mn = 88.8 ms (β
-
(100%), β
-
n (33%))
64m
25
Mn = 439 μs (internal transition (100%))
65
25
Mn = 62 ms (β
-
(100%))
66
25
Mn = 64.2 ms (β
-
(100%), β
-
n (8.4%))
66m
25
Mn = 780 μs (internal transition (about 100%))
67
25
Mn = 46.7 ms (β
-
(100%), β
-
n (10%))
68
25
Mn = 28.4 ms (β
-
(100%), β
-
n)
69
25
Mn = 16.0 ms (β
-
(100%), β
-
n)
Vapour pressure (Torr):
0.01 (974°C)
0.1 (1096°C)
1 (1219°C)
10 (1462°C)
100 (1745°C)
Electrode potential:
Mn
2+
+ 2e
-
→ Mn, E = -1.179 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)):
32 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
26.3 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
12
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
227
Neel temperature (K):
100
References:
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
Лаврухина А.К., Юкина Л.В. Аналитическая химия марганца. - М.: Наука, 1974. - pp. 11-15 [Russian]
Неорганические синтезы. - Сб. 1. - М.: ИИЛ, 1951. - pp. 10 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 78-79 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 636 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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