Thin films of amorphous alumina were fabricated using pulsed laser deposition in vacuum.
Influence of deposition parameters, specifically deposition time under vacuum and partial pressure of argon, is discussed in the original publication.
R. Boidin, T. Halenkovič, V. Nazabal, L. Beneš, P. Němec. Pulsed laser deposited alumina thin films, Ceramics International 42, 1177-1182 (2016) (Numerical data kindly provided by Tomáš Halenkovič)
Aluminium sesquioxide, Al2O3
Alumina, Aluminium oxide, Aloxite, Aluminium oxide (α), Aluminium(III) oxide, Dialuminium trioxide.
Mineral name: Corundum.
Gemstones: Sapphire, Ruby.