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Properties of substance:
sodium hexafluorosilicate
Synonyms:
sodium fluosilicate
Group of substances:
inorganic
Physical appearance:
colorless hexagonal crystals
Empirical formula (Hill's system for organic substances):
F
6
Na
2
Si
Structural formula as text:
Na2SiF6
Molar/atomic mass: 188.06
Decomposition temperature (°C):
570
Solubility (g/100 g of solvent):
ethanol
: insoluble [
Ref.
]
hydrogen fluoride 26,5%
: 1.44 (50°C) [
Ref.
]
propylene carbonate
: insoluble (25°C) [
Ref.
]
water
: 0.435 (0°C) [
Ref.
]
water
: 0.652 (17.5°C) [
Ref.
]
water
: 0.78 (25°C) [
Ref.
]
water
: 1.05 (40°C) [
Ref.
]
water
: 1.49 (60°C) [
Ref.
]
water
: 1.95 (80°C) [
Ref.
]
water
: 2.454 (100°C) [
Ref.
]
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-2913 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
207.1 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
187.1 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
99.6
LD
50
(mg/kg):
225 (rabbits, oral)
158 (rats, oral)
50 (mice, oral)
References:
CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 4-90
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1261
Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 40-41 [Russian]
Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 168-169 [Russian]
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 603 [Russian]
Рысс И.Г. Химия фтора и его неорганических соединений. - М., 1956. - pp. 361-363 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 135 [Russian]
Фтор и его соединения. – Под ред. Саймонса Дж., Т. 1. - М.: ИИЛ, 1953. - pp. 118-119 [Russian]
Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 362 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru