Rhenium

75
Re
Gruppe
7
Periode
6
Block
d
Protonen
Elektronen
Neutronen
75
75
111
Generelle Eigenschaften
Ordnungszahl
75
Atommasse
186,207
Massenzahl
186
Kategorie
Übergangsmetalle
Farbe
Grau
Radioaktiv
Nein
From the Latin word Rhenus meaning Rhine
Kristallstruktur
Einfach hexagonal
Geschichte
In 1908, Japanese chemist Masataka Ogawa announced that he discovered the 43rd element.

However, later analysis indicated the presence of rhenium (element 75), not element 43.

In 1922, Walter Noddack, Ida Eva Tacke and Otto Berg announced its separation from gadolinite and gave it the present name.
Elektronen pro Schale
2, 8, 18, 32, 13, 2
Elektronenkonfiguration
[Xe] 4f14 5d5 6s2
Re
Chile has the world's largest rhenium reserves
Physikalische Eigenschaften
Aggregatzustand
Fest
Dichte
21,02 g/cm3
Schmelzpunkt
3459,15 K | 3186 °C | 5766,8 °F
Siedepunkt
5869,15 K | 5596 °C | 10104,8 °F
Schmelzwärme
33 kJ/mol
Verdampfungswärme
705 kJ/mol
Spezifische Wärmekapazität
0,137 J/g·K
Häufigkeit in der Erdkruste
2,6×10-7%
Häufigkeit im Universum
2×10-8%
A
Danksagungen für Bilder: Wikimedia Commons (Alchemist-hp)
A high purity rhenium single crystal made by the floating zone process, an ebeam remelted rhenium bar and as well as a high purity rhenium cube for comparison
CAS-Nummer
7440-15-5
PubChem CID Number
23947
Atomeigenschaften
Atomradius
137 pm
Kovalenter Radius
151 pm
Elektronegativität
1,9 (Pauling-Skala)
Ionisierungsenergie
7,8335 eV
Molares Volumen
8,85 cm3/mol
Wärmeleitfähigkeit
0,479 W/cm·K
Oxidationszustände
-3, -1, 1, 2, 3, 4, 5, 6, 7
Anwendung
Rhenium is widely used as filaments for mass spectrographs and ion gauges.

It is also used with platinum as catalysts in the production of lead-free, high-octane gasoline.

Nickel-based superalloys of rhenium are used in the combustion chambers, turbine blades, and exhaust nozzles of jet engines.
Very little is known about the toxicity of rhenium
Isotope
Stabile Isotope
185Re
Instabile Isotope
160Re, 161Re, 162Re, 163Re, 164Re, 165Re, 166Re, 167Re, 168Re, 169Re, 170Re, 171Re, 172Re, 173Re, 174Re, 175Re, 176Re, 177Re, 178Re, 179Re, 180Re, 181Re, 182Re, 183Re, 184Re, 186Re, 187Re, 188Re, 189Re, 190Re, 191Re, 192Re, 193Re, 194Re