With heavier halides, the coordination figures are lower. Another trihalides are dimeric or polymeric with tetrahedral four-coordinate aluminium centers.[g] Aluminium trichloride (AlCl3) has a layered polymeric composition under its melting position of 192.4 °C (378 °File) but transforms on melting to Al2Cl6 dimers. At larger temperatures These increasingly dissociate into trigonal pl... https://shedsandgarages68899.loginblogin.com/45206581/top-aluminium-greenhouse-secrets