
%0 Journal Article
%A Landacanovas, AR 
%A Oterodiaz, LC 
%T A Transmission Electron Microscopy Study of the MnS-Er<sub>2</sub>S<sub>3</sub> System
%J Australian Journal of Chemistry
%D 1992/09/01
%V 45
%N 9
%P 1473-1487
%K 
%R https://doi.org/10.1071/CH9921473
%U https://www.publish.csiro.au/paper/CH9921473 
%X A systematic search mainly by means of electron diffraction and microscopy techniques was performed to elucidate the structural behaviour of the Mn-Er-S ternary system at 1373-1773 K. At 1773 K a new phase MnEr2S4 with spinel structure, a = 11.97(2) Å , was found. It transforms, due to electron beam damage (400 kV), into rock-salt (&#945;-MnS ) domains and slabs of defects formed by some unit cells of MnEr2S4 (CaTi2O4 type) and MnEr4S7 (Y5S7 type) structures. The composition range between MnEr4S7 (S/M = 1.333) and MnEr4S7 (S/M = 1.400) is covered quasi-continuously by ordered and disordered intergrowth of both phases. Two ordered phases with composition Mn3Er8S15 (S/M = 1.3636) and Mn2Er6Sll (S/M = 1.375) have been found; however, disordered crystals due to a non-uniform mixing of those structures are more commonly observed. Furthermore, a new phase with a layer structure, reminiscent of LaCrS3 type, has been found mainly at 1373 K. 
