Main page (Russian)
Search in database (English)
Properties of substance:
calcium fluoride
Group of substances:
inorganic
Physical appearance:
colorless cubic crystals
Empirical formula (Hill's system for organic substances):
CaF
2
Structural formula as text:
CaF2
Molar/atomic mass: 78.08
Melting point (°C):
1400
Boiling point (°C):
2500
Solubility (g/100 g of solvent):
acetone
: insoluble [
Ref.
]
bromine trifluoride
: 0.017 (25°C) [
Ref.
]
bromine trifluoride
: insoluble (70°C) [
Ref.
]
dimethylformamide
: 0.05 (25°C) [
Ref.
]
ethyl acetate
: insoluble [
Ref.
]
hydrogen fluoride
: 1.444 (-23°C) [
Ref.
]
hydrogen fluoride
: 1.061 (-3.3°C) [
Ref.
]
hydrogen fluoride
: 0.817 (12.2°C) [
Ref.
]
sulfur dioxide
: 0.08 (25°C) [
Ref.
]
water
: 0.0013 (0°C) [
Ref.
]
water
: 0.0015 (15°C) [
Ref.
]
water
: 0.0016 (18°C) [
Ref.
]
water
: 0.0016 (25°C) [
Ref.
]
water
: 0.0017 (40°C) [
Ref.
]
Numerical data:
Vickers hardness (GPa): 1.96
Hardness on the Mohs’ scale: 4
Density:
3.18 (20°C, g/cm
3
)
Refractive index (n
D
):
1.434 (20°C)
Vapour pressure (Torr):
1 (1625°C)
10 (1850°C)
Dissociation:
pK
sp
(0) = 10.4 (20°C, water)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
51 (g)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
29.7
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
305
Standard molar enthalpy (heat) of formation Δ
f
H (298 K, kJ/mol)
-1228 (s) [
Ref.
]
-791.2 (g) [
Ref.
]
Standard molar Gibbs energy of formation Δ
f
G (298 K, kJ/mol)
-1175.6 (s) [
Ref.
]
Standard molar entropy S (298 K, J/(mol·K))
68.5 (s) [
Ref.
]
273.8 (g) [
Ref.
]
Molar heat capacity at constant pressure C
p
(298 K, J/(mol·K))
67 (s) [
Ref.
]
LD
50
(mg/kg):
4417 (rats, oral)
References:
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 296-297
Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 140-141 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 72 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 244, 780 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 96-97 [Russian]
Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 111 [Russian]
What information do you need?
© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
Search in database (English)