Ionic radii (reported here from literature^40–42) of metal cations of interest in the current study. All the values are in Å.

Ga+	0.81 (ref. 40)	Ge2+	0.73 (ref. 41)	As3+	0.53 (ref. 42)
In+	1.04 (ref. 40)	Sn2+	0.93 (ref. 41)	Sb3+	0.76 (ref. 42)
Tl+	1.15 (ref. 40)	Pb2+	0.98 (ref. 41)	Bi3+	0.93 (ref. 42)