With heavier halides, the coordination figures are lower. The opposite trihalides are dimeric or polymeric with tetrahedral four-coordinate aluminium centers.[g] Aluminium trichloride (AlCl3) contains a layered polymeric construction beneath its melting point of 192.4 °C (378 °File) but transforms on melting to Al2Cl6 dimers. At larger temperatures those ever more dissociate into https://andresmcrft.ageeksblog.com/36098947/fascination-about-aluminium-greenhouse