Could anybody explain me the meaning of the data point “number of atoms” that is shown for any material on the material project website? I thought that it was supossed to tell the number of atoms per unit cell but it doesn’t make any sense for me in many cases. For instance, TaC (mp-1086: TaC (Cubic, Fm-3m, 225)) exihibits a fcc crystal structure [Fm3̅m] and, thus, should feature 4 atoms per unit cell. However, “number of atoms” on the website says that it’s 8.
What am I missing?