Radiodating wikipedia Meet russian teen online gratis
The coordination number of such compounds varies, but generally Al sublimes (with cracking) at 1,291 °C (2,356 °F).
Aluminium has a stacking-fault energy of approximately 200 m J/m Aluminium is a good thermal and electrical conductor, having 59% the conductivity of copper, both thermal and electrical, while having only 30% of copper's density.
Aluminium is capable of superconductivity, with a superconducting critical temperature of 1.2 kelvin and a critical magnetic field of about 100 gauss (10 milliteslas).
However, commercial application of this fact has challenges in circumventing the passivating oxide layer, which inhibits the reaction, and in storing the energy required to regenerate the aluminium metal.
The vast majority of compounds, including all Al-containing minerals and all commercially significant aluminium compounds, feature aluminium in the oxidation state 3 .
Acidification of the oxides or hydroxides affords hydrates.