Group of substances:

Physical appearance:

Empirical formula (Hill's system for organic substances):

Structural formula as text:

Molar/atomic mass: 124.94

Melting point (°C):

Hygroscopic:

Standard molar enthalpy (heat) of formation Δ_fH⁰ (298.15 K, kJ/mol):

Standard molar entropy S⁰ (298.15 K, J/(mol·K)):

LD₅₀ (mg/kg):

References:

1. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 12ed., Vol. 1-5. - Wiley, 2012. - pp. 4042
   
2. The Merck Index 11th ed., Merck & Company, 1989. - pp. 1368
   
3. Алабышев А.Ф., Грачев К.Я., Зарецкий С.А., Лантратов М.Ф. Натрий и калий (получение, свойства и применение). - Л.: ГНТИХЛ, 1959. - pp. 34 [Russian]
   
4. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 166-167 [Russian]
   
5. Оболончик В.А. Селениды. – М.: Металлургия, 1972. - pp. 93-99 [Russian]
   
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   © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru