Structural Analysis of Molybdenum Bronzes

T. Tanaka, H. Aritani, S. Yoshida, K. Eda, N. Sotani, S. Hasegawa
1997 Journal de Physique IV : Proceedings  
Hydrogen molybdenum bronzes, H""Mo03 (type 1) and H, "Moo3 (type 11) were characterized by MO K-edge XAFS spectroscopy. XANES specetra showed that type I has an axially symmetric MOO, unit which is mainly conncted to each other with vertices sharing and a MOO, unit in type I1 are similar to that in Moo2. EXAFS spectra suggested that the MoOx sheet in type I is similar to MOO, while in type 11, aMoOx sheet is similar to that in mtile MOO, in which MOO, is conneced to form a chain by sharing the
more » ... ain by sharing the edges of opposite sides. The curve fitting analysis of MO-0 bonds for type I supported the earlier results obtained from diffraction and 1R methods; a MOO, unit has C" symmetry. In case of type 11, D" smcture is possible and hydrogen is captured by Mo=O bonds resulting in the formation of MeOH bonds. 0 2 4 6 R I A Figure 2 Fourier transforms of EXAFS of MO compounds. (a)-(e), seecaptions toFig. 1
doi:10.1051/jp4:19972164 fatcat:xzoid7pg2baebpumskxkudztwq