Synthesis of Li4 xSi1−xFexO4 solid solution by dry ball 25 01 2019· Synthesis of Li 4 x Si 1−x Fe x O 4 solid solution by dry ball milling and its highly efficient CO 2 chemisorption in a wide temperature range and low CO 2 concentrations† Hugo A Lara García a Oscar Ovalle Encinia b José Ortiz Landeros c Enrique Lima b and Heriberto Pfeiffer b