Except a few Heusler phases (X2YZ, X, and Y are transition elements, Z = p-block elements; [e.g. Co2MnZ (Z = Al, Si, Ga, Ge), Co2FeZ (Z = Al, Ga, In, Si, Ge), Cu2NiSn], atomic ordering between the neighbouring elements in ternary intermetallic compounds is very rare and often attracts the interest of structural chemists . The degree of ordering can range from complete disorder (random distribution of atoms) to complete order (strict alternation of atoms) and can have a significant impact on the physical and chemical properties of the material. One interesting example is Gd3CoNi (C2/m, mS20, , where the site preference between the neighbouring Ni and Co is intriguing; Co selectively occupies one of the two independent Ni-sites of binary Gd3Ni2, and at the limiting ternary composition, ordering between Co and Ni is observed, which significantly modifies the magnetic properties . On the other hand, Cd2Cu3In is an ordered substituent variant [space group P4132 (213)] of the cubic MgCu2-type Laves phase, where ordering between the proximate Cd and In is noteworthy .