  The structural, vibrational, thermodynamical and optical properties of
technologically important, weakly coupled MAX compound, Sc2AlC are calculated
using density functional theory (DFT). The structural properties of Sc2AlC are
compared with results reported earlier. The vibrational, thermodynamical, and
optical properties are theoretically estimated for the first time. The phonon
dispersion curve has been calculated and the dynamical stability of this
compound has been investigated. The optical and acoustic modes are observed
clearly. We have calculated the Helmholtz free energy (F), internal energy (E),
entropy (S) and specific heat capacity (Cv) from the phonon density of states.
Various optical parameters have also been calculated. The reflectance spectrum
shows that it this compound has the potential to be used as a solar reflector.
