• lái

  • 75

    Re

  • Transition metals

    Rhenium

  • Group

    7

  • Period

    6

  • Block

    d

化学元素【铼】
  • Protons

    75

  • Electrons

    75

  • Neutrons

    111

拉丁文“莱茵河”

General Properties

Atomic Number
75
Atomic Weight
186.207
Mass Number
186
Category
Transition metals
Color
Gray
Radioactive
No
Discovery year
1925
Crystal Structure
Simple Hexagonal

History

1908年,日本化学家小川真孝宣称他发现了43号元素

然而事实证明他发现了75号元素,而不是43号元素

1922年,瓦尔特 诺丹科,艾达 伊万和奥托 伯格宣称他们从硅铍钇矿中分离出了铼单质并给了他现在的名字
Electrons per shell
2, 8, 18, 32, 13, 2
Electron Configuration
[Xe] 4f14 5d5 6s2
Re

Physical Properties

Phase
Solid
Density
21.02g/cm3
Melting Point
3459.15 K | 3186 °C | 5766.8 °F
Boiling Point
5869.15 K | 5596 °C | 10104.8 °F
Heat of Fusion
33 kJ/mol
Heat of Vaporization
705 kJ/mol
Specific Heat Capacity
0.137 J/g·K

Atomic Properties

Atomic Radius
137 pm
Covalent Radius
151 pm
Electronegativity
1.9 (鲍林标度)
Ionization Potential
7.8335 eV
Atomic Volume
8.85 cm3/mol
Thermal Conductivity
0.479 W/cm·K
Oxidation States
-3, -1, 1, 2, 3, 4, 5, 6, 7
Abundance in Earth's crust
2.6×10-7%
Abundance in Universe
2×10-8%
CAS Number
7440-15-5
PubChem CID Number
23947

Applications

铼在光谱分析和离子测量的方面被广泛用作灯丝

它同样被用来和铂制成合金催化剂制造无铅高辛烷值汽油

添加铼的镍基超级合金被用作摩托引擎空腔,涡轮叶片和排气筒
智利是世界上最大的铼产地
Stable Isotopes
185Re
Unstable Isotopes

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