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. 2013 May 1;7:80. doi: 10.1186/1752-153X-7-80

Table 3.

Summary of metal tungstates wavelength and band gap energy

System Wavelength (nm) Eg (eV) this work Eg (eV) literature Ionic radius of cation A (Å)
Bi2WO6
 320.56
 3.05
 2.7 [43]
 2.67
BaWO4
 223.03
 4.60
 4.8- 5.58 [39,40]
 1.42
NiWO4 299.03 2.97 2.28- 2.95 [41,42] 4.5 [14] 0.69