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Quaternary antimonide oxides REMnSbO (RE = La, Ce, Pr, Nd, Sm,Gd, Tb) and REZnSbO (RE = La, Ce, Pr) were synthesized from the RESb monoantimonides and MnO, respectively ZnO, in sealed tubes at 1170 K. Single crystals were obtained from NaCl/KCl salt fluxes. The ZrCuSiAs-type (space group P4/nmm) structures of LaMnSbO (a = 423.95(7), c = 955.5(27) pm, wR2 = 0.067, 247 F 2 ), CeMnSbO (a = 420.8(1), c = 950.7(1) pm, wR2 = 0.097, 250 F 2 ), SmMnSbO (a = 413.1(1), c = 942.3(1) pm, wR2 = 0.068, 330 F 2 ), LaZnSbO (a = 422.67(6), c = 953.8(2) pm, wR2 = 0.052, 259 F 2 ), and NdZnSbO (a = 415.9(1), c = 945.4(4) pm, wR2 = 0.109, 206 F 2 ) were refined from single crystal X-ray diffractometer data. The structures consist of covalently bonded (RE 3+ O 2− ) +  and (T 2+ Sb 3− ) −  layers with weak ionic interlayer interactions. The oxygen and transition metal atoms both have tetrahedral coordination within the layers.  121 Sb Mössbauer spectra of the REMnSbO and REZnSbO compounds show single antimony sites with isomer shifts close to −8 mm s −1 , in agreement with the antimonide character of these compounds. PrMnSbO and NdMnSbO show transferred hyperfine fields of 8 T at 4.2 K.

zeitschrift für naturforschung b

Structural and  121 Sb Mössbauer Spectroscopic Investigations of the Antimonide Oxides REMnSbO (RE = La, Ce, Pr, Nd, Sm, Gd, Tb) and REZnSbO (RE = La, Ce, Pr)