Experimental data originating from the NERC IRF project entitled "Calcium perovskite: the forgotten mantle phase". Data consists of: - large volume press synchrotron XRD ± ultrasonic velocity measurements (ID06-LVP ESRF) - diamond anvil cell XRD data (I15 Diamond) - Neutron Inelastic scattering data (IN8 ILL) - D111 deformation experiment XRD and imaging from (NE07 PF-AR, KEK)