Simple and Efficient Rout for Synthesis of Spinel Nanopigments

Table 1

Crystallite size and colorimetric analysis of the calcined samples.

Sample	Crystallite size (nm)	𝐿^∗	𝑎^∗	𝑏^∗	Δ𝐸
CoAl2O4	27	41.5	−10.6	−30.815	52.765
Co0.8Mg0.2Al2O4	17	43.2	−14.5	−18.125	49.040
Co0.6Mg0.4Al2O4	13	45.7	−12.2	−6.171	47.72
Co0.4Mg0.6Al2O4	18	50.4	−12.0	−6.213	52.23
Co0.2Mg0.8Al2O4	7	63.7	−10.6	−10.612	65.52
Co0.1Mg0.9Al2O4	9	71.4	−8.1	−12.57	73
MgAl2O4	8	81.8	−0.31	2.501	81.93