Structural, elastic, electronic properties and stability trends of 1111-like silicide arsenides and germanide arsenides MCuXAs (MÂ =Â Ti, Zr, Hf; XÂ =Â Si, Ge) from first principles

► Silicide arsenides and germanide arsenides of Ti, Zr, Hf are probed from first principles. ► Structural, elastic, electronic properties and stability trends are evaluated. ► Bulk moduli of HfCuSiAs and HfCuGeAs are the largest among all 1111-like phases. ► Chemical bonding is analyzed.