The Effect of Aluminum Sources On (Gd0.7Lu0.3)3Al5O12 Cubic Garnet Structure Synthesized by Co Precipitation Method

The multi-component cubic garnet (Gd_1-xLu_x)₃Al₅O₁₂ structure attracts a lot of attention, making it the most popular in fields including as optics electronics. The one with the large Ln³⁺ cations is (Tb₃Al₅O₁₂). For eight fold coordination, the radius of the Tb³⁺ cation is 1.040. Because of its small ionic size (0.977 A°), lutetium is thought to be a stabilizer for the metastable (Gd₃Al₅O₁₂). According to the previous studies, GAG garnet can be stable at 1300°C when Gd is replaced with roughly 10% Lu and the radius of Ln :(Gd+Lu) is 1.0454. The Ln₂O₃–Al₂O₃ system is widely known to exist in three crystal phases: LnAlO₃ (LnAP with a perovskite structure), Ln₄Al₂O₉ (LnAM with a monoclinic structure), and Ln₃Al₅O₁₂ (LnAG with a cubic garnet structure) [1].