Aluminium oxydatum calcinatum temperatus in cristallinum genus alphei-type producti ad temperaturam idoneam combustus est;combusti per combusti α-type Alumina sicut materia rudis, producta per pilam minutissimam pulveris molentis Alumina.Princeps temperatus aluminium oxydatum combusti pulveris altum punctum liquescens, excellentis roboris mechanicae, duritiei, summa resistivity, et scelerisque conductivity.Late adhiberi potest in instrumentis electronicis, ceramicis structuralibus, materiae refractariis, materiae obsistentibus, expoliendis, aliisque industriis.