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Properties of substance:

ruthenium

Group of substances:

inorganic

Physical appearance:

hexagonal metal

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

Ru

Structural formula as text:

Ru

Molar/atomic mass: 101.07

Melting point (°C):

2250

Boiling point (°C):

4200

Solubility (g/100 g of solvent):

diethyl ether: insoluble [Ref.]
ethanol: insoluble [Ref.]
mercury: insoluble [Ref.]
water: insoluble [Ref.]

Numerical data:

Year of discovery: 1843
Superconducting temperature (K): 0.493

Density:

12.4 (20°C, g/cm3)

Half-life:

10044Ru = stable ( (isotopic abundance 12,6%))
10144Ru = stable ( (isotopic abundance 17,06%))
101m44Ru = 17.5 μs (internal transition (100%))
10244Ru = stable ( (isotopic abundance 31,55%))
10344Ru = 39.247 d (β- (100%))
103m44Ru = 1.69 ms (internal transition (100%))
10444Ru = stable ( (isotopic abundance 18,62%))
10544Ru = 4.44 h (β- (100%))
105m44Ru = 340 ns (internal transition (100%))
10644Ru = 371.8 d (β- (100%))
10744Ru = 3.75 min (β- (100%))
10844Ru = 4.55 min (β- (100%))
10944Ru = 34.5 s (β- (100%))
109m44Ru = 680 ns (internal transition (100%))
11044Ru = 12.04 s (β- (100%))
11144Ru = 2.12 s (β- (100%))
11244Ru = 1.75 s (β- (100%))
11344Ru = 800 ms (β- (100%))
113m44Ru = 510 ms ()
11444Ru = 540 ms (β- (100%))
11544Ru = 318 ms (β- (100%))
11644Ru = 204 ms (β- (100%))
11744Ru = 151 ms (β- (100%))
117m44Ru = 2.49 μs (internal transition (100%))
11844Ru = 99 ms (β- (100%))
11944Ru = 69.5 ms (β- (100%))
12044Ru = 45 ms (β- (100%))
12144Ru = 29 ms (β- (100%))
12244Ru = 25 ms (β- (100%), β-n)
12344Ru = 19 ms (β- (100%), β-n)
12444Ru = 15 ms (β- (100%), β-n)
8844Ru = 1.3 s (β+ (100%))
8944Ru = 1.5 s (β+ (100%), β+p (3.1%))
9044Ru = 11 s (β+ (100%))
9144Ru = 8.0 s (β+ (100%))
91m44Ru = 7.6 s (β+ (100%))
9244Ru = 3.65 min (β+ (100%))
9344Ru = 59.7 s (β+ (100%))
93m44Ru = 10.8 s (β+ (78.0%), internal transition (22.0%), β+p (0.027%))
93n44Ru = 2.49 μs (internal transition (100%))
9444Ru = 51.8 min (β+ (100%))
94m44Ru = 71 μs (internal transition (100%))
9544Ru = 1.643 h (β+ (100%))
9644Ru = stable ( (isotopic abundance 5,54%))
9744Ru = 2.8370 d (β+ (100%))
9844Ru = stable ( (isotopic abundance 1,87%))
9944Ru = stable ( (isotopic abundance 12,76%))

Vapour pressure (Torr):

0.1 (2655°C)
1 (2940°C)
10 (3290°C)
100 (3730°C)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

0 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

0 (s)

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

28.5 (s)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

24.1 (s)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

24

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

602

References:

  1. Автократова Т.Д. Аналитическая химия рутения. - М.: ИАН СССР, 1962. - pp. 9-10 [Russian]
  2. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
  3. Звягинцев О.Е., Колбин Н.И., Рябов А.Н., Автократова Т.Д., Горюнов А.А. Химия рутения. - М.: Наука, 1965 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 94 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru