Figure 8From: Structural characterization and colour of MgxCu3-xV2O8 (0 ≤ x ≤ 3) and MgyCu2-yV2O7 (0 ≤ y ≤ 2) compositions Visible spectra of compositions at 800°C. Visible spectra of: (a) MgyCu2-yV2O7 (0.0 ≤ y ≤ 2.0) and (b) MgxCu2-xP2O7 (0.0 ≤ x ≤ 1.5) samples fired at 800°C; y = 0.50 (2), y = 0.75 (3), y = 1.00 (4), y = 1.25 (5), y = 1.50 (6), y = 1.75 (7), y =2.00 (8).Back to article page