Table 1: 5D0 ⟶ 7F2/5D0 ⟶ 7F1 relative emission intensity ratio.

Sample5D0 ⟶ 7F2/5D0 ⟶ 7F1

300°C-1 h8.80
600°C-1 h5.58
900°C-1 h5.26
900°C-2 h6.38
900°C-3 h5.97
900°C-4 h5.71
900°C-5 h5.87