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Properties of substance:
protoactinium
Group of substances:
inorganic
Physical appearance:
metal
Empirical formula (Hill's system for organic substances):
Pa
Structural formula as text:
Pa
Molar/atomic mass: 231.0359
Melting point (°C):
1572
Boiling point (°C):
4487
Numerical data:
Year of discovery: 1917
Superconducting temperature (K): 1.4
Density:
15.37 (20°C, g/cm
3
)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
16.7
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
481
References:
Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 580 [Russian]
Пальшин Е.С., Мясоедов Б.Ф., Давыдов А.В. Аналитическая химия протактиния. - М.: Наука, 1968. - pp. 16-17 [Russian]
Успехи химии. - 1960. - Т.29, №7. - pp. 882-898 [Russian]
Успехи химии. - 1966. - Т.35, №3. - pp. 460-486 [Russian]
Химическая энциклопедия. - Т. 4. - М.: Советская энциклопедия, 1995. - pp. 111 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru