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Properties of substance:
caesium iodide
Synonyms:
cesium iodide
Group of substances:
inorganic
Physical appearance:
colorless cubic crystals
Empirical formula (Hill's system for organic substances):
CsI
Structural formula as text:
CsI
Molar/atomic mass: 259.81
Melting point (°C):
621
Boiling point (°C):
1280
Solubility (g/100 g of solvent):
acetone
: 0.159 (18°C) [
Ref.
]
acetone
: 0.139 (37°C) [
Ref.
]
acetonitrile
: 0.76 (18°C) [
Ref.
]
acetonitrile
: 0.99 (25°C) [
Ref.
]
ammonia liquid
: 151.7 (0°C) [
Ref.
]
ethanol
: soluble [
Ref.
]
formic acid
: 28.1 (18°C) [
Ref.
]
formic acid
: 29.5 (25°C) [
Ref.
]
furfural
: sparingly soluble [
Ref.
]
hydrazine
: soluble [
Ref.
]
methanol
: 3.05 (18°C) [
Ref.
]
methanol
: 3.79 (25°C) [
Ref.
]
nitrobenzene
: sparingly soluble [
Ref.
]
nitromethane
: sparingly soluble [
Ref.
]
water
: 44.1 (0°C) [
Ref.
]
water
: 67.5 (15°C) [
Ref.
]
water
: 85.6 (25°C) [
Ref.
]
water
: 122.8 (50°C) [
Ref.
]
water
: 170.8 (75°C) [
Ref.
]
Density:
4.51 (20°C, g/cm
3
)
Refractive index (n
D
):
1.7876 (20°C)
Vapour pressure (Torr):
1 (737°C)
10 (872°C)
100 (1056°C)
Dipole moment (D):
10.2 (600°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-253.1 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-333.5 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
130 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
51.9 (s)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
153 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
275.2 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
37.46 (g)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
26
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
133
References:
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 459-462
Плющев В.Е., Степин Б.Д. Аналитическая химия рубидия и цезия. - М.: Наука, 1975. - pp. 22-27 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 111 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 734-735 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru