Coupling of Jahn-Teller and tilting distortions in high temperature structural phase transition of the Ca0.2Sr0.6Nd0.2Mn1−xCrxO3; 0 ≤ x ≤ 0.2 perovskites

► Jahn-Teller distortions develop in SrMnO3 due to Nd doping. ► Ca and Nd doping tune the magnitude of the MnO6 tilting. ► Cr doping alters the Cr spontaneous strains that develop as a consequence.