Lattice parameters, unit-cell volume and velocity data of Al-bearing superhydrous phase B at various conditions and geotherms and mineral proportions used in calculations

This dataset contains the lattice parameters, unit-cell volume, and velocity data obtained in SPring-8, Japan using synchrotron X-rays combined with ultrasonic interferometry techniques in a multi-anvil apparatus, up to 21 GPa and 900 K. All data are discussed in \"Effect of Al-incorporation on the sound velocities of superhydrous phase B at high pressure and high temperature\", submitted to Geophysical Research Letters.