Structural and optical characterization of metal tungstates (MWO4; M=Ni, Ba, Bi) synthesized by a sucrose-templated method

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

ISSN: 2661-801X