Crystal Structure of the Product of Mg 2+Insertion into V 2O 5Single Crystals
Abstract
Chemical (by interaction with a dibutylmagnesium solution) and electrochemical (in acetonitrile solution of magnesium perchlorate) insertion of Mg 2+into the single crystals of V 2O 5was performed. The morphology change of V 2O 5crystals as a result of the Mg 2+insertion was studied by scanning electron microscopy. The wavelength dispersive electron probe microanalysis clearly showed the presence of Mg (at least) at the surface of intercalated V 2O 5. Based on the single crystal X-ray diffraction study of intercalated V 2O 5(orthorhombic, Pmn2 1, a= 11.544(6), b= 4.383(3), c= 3.574(2) Å, Z= 4) the location of a small amount of Mg (∼1%) in the bulk V 2O 5may be suggested, with [6 + 4] oxygen atoms surrounding Mg. The resulting Mg-O separations essentially exceed the accepted values for the Mg-O distances in crystals with hexacoordinated Mg atoms, which may be correlated with the structural and electrochemical properties of Mg 2+-inserted V 2O 5.
- Publication:
-
Journal of Solid State Chemistry France
- Pub Date:
- May 1996
- DOI:
- 10.1006/jssc.1996.0186
- Bibcode:
- 1996JSSCh.123..317S