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Table 1 Variation in the lattice constant with Cr concentrations

From: Structural and Visible-Near Infrared Optical Properties of Cr-Doped TiO2 for Colored Cool Pigments

The impurity concentration Lattice constant
800 °C (anatase) 1000 °C (rutile)
a = b (Å) c (Å) Vol (Å 3) a = b (Å) c (Å) Vol (Å 3)
x = 0 3.778 9.499 135.56
x = 0.00625 3.771 9.486 134.89 4.575 2.952 61.79
x = 0.0125 3.769 9.483 134.74 4.573 2.952 61.73
x = 0.025 3.768 9.480 134.56 4.571 2.948 61.6
x = 0.0375 3.767 9.476 134.47 4.566 2.946 61.41