Abstract: | The crystal structures of Tb(Al0.15Si0.85), (Tb0.70Zr0.30)(Al0.17Si0.83) and Zr(Al0.22Si0.78) have been refined from single‐crystal X‐ray diffraction data. The three compounds crystallize with CrB‐type structures (Pearson symbol oS8, space group Cmcm): Tb(Al0.15Si0.85): a = 4.2715(5), b = 10.5595(15), c = 3.8393(5) Å; (Tb0.70Zr0.30)(Al0.17Si0.83): a = 4.163(2), b = 10.423(5), c = 3.8543(18) Å; Zr(Al0.22Si0.78): a = 3.7824(6), b = 10.0164(16), c = 3.7795(5) Å. The existence of a significant CrB‐type solid solution in the quaternary system Tb‐Zr‐Al‐Si, based on the ternary compound Tb(Al0.15Si0.85) and extending toward the solid solution based on the binary compound ZrSi in the Zr‐Al‐Si system, cannot be excluded. |