TY - JOUR
T1 - Crystal symmetry of La3Cu2VO9 and La4Cu3MoO12 derived from the YA1O3 hexagonal structure by transmission electron microscopy
AU - Malo, Sylvie
AU - Vander Griend, Douglas A.
AU - Poeppelmeier, Kenneth R.
AU - Wang, Yanguo
AU - Dravid, Vinayak P.
N1 - Funding Information:
We would like to thank Luke Brewer for his help in collecting the CBED pattern. This work is supported by a National Science Foundation (NSF) graduate fellowship for DAVG, by National Science Foundation (Award No. DMR-9120000) through the Science and Technology Center for Superconductivity, and made use of the Central Facilities at the Materials Research Center of Northwestern University (NSF Award No. DMR-0076097). VPD was partially supported by US DOE Grant No DE-FGOZ-92ER45475.
PY - 2001
Y1 - 2001
N2 - La4Cu3MoO12 and La3Cu2VO9, homeotypes of YA1O3, an ABO3 hexagonal phase, have been investigated using a variety of transmission electron microscopy techniques. Both compounds possess the same hexagonal subcell but exhibit different supercells. The unit cell parameters and symmetry have been determined using selected area and convergent beam electron diffraction techniques. For La3Cu2VO9, electron energy loss spectroscopy and energy dispersive X-ray spectroscopy were used to determine the oxidation-state of vanadium and the cation stoichiometry, respectively, which conforms to La3Cu2VO9. This paper highlights the need for multitechnique approaches to complex oxide structures.
AB - La4Cu3MoO12 and La3Cu2VO9, homeotypes of YA1O3, an ABO3 hexagonal phase, have been investigated using a variety of transmission electron microscopy techniques. Both compounds possess the same hexagonal subcell but exhibit different supercells. The unit cell parameters and symmetry have been determined using selected area and convergent beam electron diffraction techniques. For La3Cu2VO9, electron energy loss spectroscopy and energy dispersive X-ray spectroscopy were used to determine the oxidation-state of vanadium and the cation stoichiometry, respectively, which conforms to La3Cu2VO9. This paper highlights the need for multitechnique approaches to complex oxide structures.
KW - EELS
KW - Electron diffraction
KW - LaCuMoO
KW - LaCuVO
KW - Transmission electron microscopy
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U2 - 10.1016/S1293-2558(00)01127-4
DO - 10.1016/S1293-2558(00)01127-4
M3 - Article
AN - SCOPUS:0035102972
VL - 3
SP - 17
EP - 23
JO - Solid State Sciences
JF - Solid State Sciences
SN - 1293-2558
IS - 1-2
ER -