Figure 4
Raman spectra of Na2MoO4 (left) and Na2WO4 (right) in the range 0–1200 cm−1 (the full range of data to 4000 cm−1 is given in the electronic supplement). Band positions and vibrational assignments are indicated. For the tungstate these agree very well with literature values (e.g., Busey & Keller, 1964) whereas for the molybdate, these data show a systematic shift to lower frequencies by 3–4 wavenumbers with respect to published values (Luz Lima et al., 2010, 2011). |