LSAT has a Mohs hardness of 6.5, placing it between quartz and the mineral feldspar. Its relative dielectric constant is ~22 and it has a thermal expansion coefficient of 8~10×10/K. The thermal conductivity of LSAT is 5.1 WmK. LSAT's (cubic) lattice parameter of 3.868 Å makes it compatible for the growth of a wide range of perovskite oxides with a relatively low strain.
LSAT's melting temperature of 1,840C is lower compared to similar alternative substrates, such as LaAlO. This property enables the growth of LSAT single crystals using the Czochralski process (CZ), which has commercial advantages.