Supporting data for the manuscript: Sound velocity anisotropy and single-crystal elastic moduli of MgO to 43 GPa

The uploaded two sets of experimental data contain the raw TDBS signals
recorded at each pressure step for the MgO [100] and [111] samples. Please
note that each “.txt” file contains two columns of data, the first column
is time in picosecond, the second column is the relative change of
reflectivity. The uploaded Tables “Table MgO 100” and “Table MgO 111”
summarize our processed experimental data, as well as the recently
measured refractive indexes and accordingly the derived longitudinal sound
velocities. In which, the pressures are given in GPa, Brillouin
frequencies in GHz, longitudinal sound velocities VL<100>
and VL<111> in km/s. Refractive indexes are dimensionless.