The gallides CaMgGa, SrMgGa, BaMgGa and YbMgGa were synthesized from the elements in sealed tantalum ampoules in muffle furnaces. The phase purity of the samples was checked by powder X‐ray diffraction. CaMgGa and YbMgGa crystallize with the ZrNiAl type structure, space group
P
2
m, whereas SrMgGa and BaMgGa adopt an ordering variant of the Cu
2Sb/PbFCl type, space group
P4/
nmm. The...