Highly Dispersed Re-Doped CoAl₂O₄ Nanopigments: Synthesis and Chromatic Properties

Table 1

Lattice constant and crystal size of CoAl₂O₄ and CoAl_1.95Re_0.05O₄.

Sample	Lattice constant	Crystal size/nm	Strain/%	Radius/
CoAl2O4	8.09881	18.4	−0.081	R() = 0.54
CoAl1.95Y0.05O4	8.09550	12.8	−0.094	1.02
CoAl1.95La0.05O4	8.09297	10.3	−0.426	1.18
CoAl1.95Nd0.05O4	8.09050	8.9	−0.591	N/A
CoAl1.95Sm0.05O4	8.08787	11.6	−0.419	1.08
CoAl1.95Eu0.05O4	8.08547	11	−0.125	1.07