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Synthesis, Microstructural Characterisation and Magnetic Study of Two New One‐Dimensional Members of the (A 3 ZnMnO 6 ) α (A 3 Mn 3 O 9 ) β Homologous Series (A = Ba, Sr)
Author(s) -
Hernando María,
Boulahya Khalid,
Parras Marina,
GonzálezCalbet José M.
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200212)2002:12<3190::aid-ejic3190>3.0.co;2-y
Subject(s) - chemistry , octahedron , homologous series , crystallography , polyhedron , antiferromagnetism , selected area diffraction , crystal twinning , hexagonal crystal system , series (stratigraphy) , magnetic susceptibility , microstructure , hexagonal prism , condensed matter physics , nanotechnology , crystal structure , transmission electron microscopy , geometry , materials science , paleontology , physics , mathematics , biology
Two new members of the (A 3 ZnMnO 6 ) α (A 3 Mn 3 O 9 ) β one‐dimensional homologous series have been synthesised with the compositions Sr 4 Mn 2 ZnO 9 and Ba 5 Mn 3 ZnO 12 . Their structures can be described as a hexagonal array of infinite 1D‐chain polyhedra, running parallel to the c ‐axis, formed by two face‐sharing octahedra linked by one trigonal prism for Sr 4 Mn 2 ZnO 9 , and one more octahedron between prisms for Ba 5 Mn 3 ZnO 12 . Both oxides have a twinned microstructure as evidenced by SAED and HREM. Sr 4 Mn 2 ZnO 9 shows a pronounced antiferromagnetic character with a broad susceptibility maximum at 100 K due to short‐range ordering. At low temperature, the susceptibility data suggest a transition to a 3D long‐range ordering. (© Wiley‐VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)