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(Left) CW-o periodic model of the unit cell. (Right) CW-d periodic model. The W2 was shifted by in the direction opposite to an oxygen atom .
Room temperature depolarized Raman spectra of powders calcinated at 723, 773, 873, and for : (a) CW and (b) CM.
PL spectrum of powders calcinated at 723, 773, 873, and for , excited with the excited wavelength of a krypton ion laser: (a) CW and (b) CM.
Gap energy and atom-projected DOS of ordered and disordered CW and CM periodic models. below the VB in total DOS.
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