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Properties of substance:

rhenium

Group of substances:

inorganic

Physical appearance:

hexagonal metal

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

Re

Structural formula as text:

Re

Molar/atomic mass: 186.21

Melting point (°C):

3190

Boiling point (°C):

5600

Solubility (g/100 g of solvent):

aluminum fused: soluble [Ref.]
copper liquid: insoluble [Ref.]
iron fused: soluble [Ref.]
mercury: insoluble [Ref.]
silver: insoluble [Ref.]
tin liquid: insoluble [Ref.]
water: insoluble [Ref.]

Numerical data:

Year of discovery: 1925
Superconducting temperature (K): 1.697

Density:

21.04 (20°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1aster]
    2KReO4 + 7H2 → 2Re + 2KOH + 6H2O
  2. [Ref.1aster]
    2NH4ReO4 + 7H2 → 2Re + 2NH3 + 8H2O

Reactions:

  1. [Ref.1aster]
    Re + 3F2 → ReF6
  2. Yeild 80%. [Ref.1aster]
    2Re + 5Cl2 → 2ReCl5

Half-life:

159m75Re = 21.6 μs (α (7.5%))
16075Re = 611 μs (p (89%), α (11%))
160m75Re = 2.8 μs (internal transition (100%))
16175Re = 440 μs (p (about 100%), α (< 1.4%))
161m75Re = 14.7 ms (α (93.0%), p (7.0%))
16275Re = 107 ms (α (94%))
162m75Re = 77 ms (α (91%))
16375Re = 390 ms (α (32%))
163m75Re = 214 ms (α (66%))
16475Re = 719 ms ()
164m75Re = 890 ms (α (3%))
16575Re = 2.62 s (α (14%))
165m75Re = 1.74 s (α (13%))
16675Re = 2.25 s (α (5%))
16775Re = 3.4 s (α (about 100%))
167m75Re = 5.9 s (β+ (about 99%), α (about 1%))
16875Re = 4.4 s (β+ (about 100%), α (0.005%))
16975Re = 8.1 s ()
169m75Re = 15.1 s ()
17075Re = 9.2 s (β+ (about 100%))
17175Re = 15.2 s (β+ (100%))
17275Re = 15 s (β+ (100%))
172m75Re = 55 s (β+ (100%))
17375Re = 2.0 min (β+ (100%))
17475Re = 2.40 min (β+ (100%))
17575Re = 5.89 min (β+ (100%))
17675Re = 5.3 min (β+ (100%))
17775Re = 14 min (β+ (100%))
177m75Re = 50 μs (internal transition (100%))
17875Re = 13.2 min (β+ (100%))
17975Re = 19.5 min (β+ (100%))
179m75Re = 95 μs (internal transition (100%))
179n75Re = 408 ns (internal transition (100%))
179p75Re = 466 μs (internal transition (100%))
18075Re = 2.46 min (β+ (100%))
180n75Re = 9.0 μs (internal transition (100%))
18175Re = 19.9 hasа (β+ (100%))
181m75Re = 156.7 ns (internal transition (100%))
181n75Re = 250 ns (internal transition (100%))
181p75Re = 11.5 μs (internal transition (100%))
181q75Re = 1.2 μs (internal transition (100%))
18275Re = 64.2 hasа (β+ (100%))
182m75Re = 14.14 hasа (β+ (100%))
182n75Re = 585 ns (internal transition (100%))
182p75Re = 780 ns (internal transition (100%))
18375Re = 70.0 d (electron capture (100%))
183m75Re = 1.04 μs (internal transition (100%))
18475Re = 35.4 d (β+ (100%))
184m75Re = 169 d (internal transition (74.5%), electron capture (25.5%))
18575Re = stable ( (isotopic abundance 37,4%))
185m75Re = 121 ns (internal transition (100%))
18675Re = 3.7183 d (β- (92.53%), electron capture (7.47%))
186m75Re = 200 000 y ()
18775Re = 43 300 000 000 y (β- (100%) (isotopic abundance 62,6%))
187m75Re = 555.3 ns (internal transition (100%))
187n75Re = 354 ns (internal transition (100%))
18875Re = 17.0040 d (β- (100%))
188m75Re = 18.59 min (internal transition (100%))
18975Re = 24.3 hasа (β- (100%))
189m75Re = 223 μs (internal transition (100%))
19075Re = 3.1 min (β- (100%))
190m75Re = 3.2 hasа (β- (54.4%))
19175Re = 9.8 min (β- (100%))
191m75Re = 51 μs (internal transition (100%))
19275Re = 16.0 s (β- (100%))
192m75Re = 88 μs (internal transition (100%))
192n75Re = 70 s ()
193m75Re = 69 μs (internal transition (100%))
19475Re = 5 s (β- (100%))
194m75Re = 25 s (β- (100%))
194n75Re = 100 s (β- (100%))
194p75Re = 45 μs (internal transition (100%))
194q75Re = 38 μs (internal transition (100%))
19575Re = 6 s (β- (100%))
19675Re = 2.4 s ()

Vapour pressure (Torr):

0.01 (3060°C)
0.1 (3375°C)
1 (3760°C)
10 (4250°C)
100 (4880°C)

Electrode potential:

Re3+ + 3e- → Re, E = 0.3 V (water, 25°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)):

36.5 (s)

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

25.2 (s)

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

33.5

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

715.5

LD50 (mg/kg):

10000 (rats, intraperitoneal)

References:

  1. Inorganic Syntheses. - Vol. 1. - New York and London, 1939. - pp. 175-178
  2. Вредные химические вещества: Неорганические соединения элементов V-VIII групп. Справочник. - Л., 1989. - pp. 424-425 [Russian]
  3. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 91 [Russian]
  5. Редкие и рассеянные элементы. Химия и технология. - Кн. 3. - М.: Мисис, 2003. - pp. 313-315, 333-365 [Russian]
  6. Химическая энциклопедия. - Т. 4. - М.: Советская энциклопедия, 1995. - pp. 236-238 [Russian]
  7. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 505 [Russian]
  8. Химия и технология редких и рассеянных элементов. - Ч. 3. - М.: Высшая школа, 1976. - pp. 277-279 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru