Figure 6From: Structural characterization and colour of MgxCu3-xV2O8 (0 ≤ x ≤ 3) and MgyCu2-yV2O7 (0 ≤ y ≤ 2) compositions Variation of UV–vis-NIR spectra from Mg x Cu 3-x V 2 O 8 compositions. UV–vis-NIR spectra of MgxCu3-xV2O8 (0.0 ≤ x ≤ 3.0) samples fired at: (a) 600, (b) 800 and (c) 1000 ºC; x = 0.0 (1), x = 0.5 (2), x = 1.0 (3), x = 1.5 (4), x = 2.0 (5), x = 2.5 (6) and x = 3.0 (7).Back to article page