Table 2. Ab initio calculated parameters of the crystal field acting on the ground J = 15/2 multiplet on the basis of the ab intio results presented in Table 1 (in units of cm⁻¹). The parameters are given for the coordinate system employed in the ab initio calculations (given in the SI).

k	q	parameters of the crystal field
2	−2	−0.8223285E + 00
2	0	−0.2952967E + 01
2	2	0.2085183E + 01
4	−4	0.5765483E − 02
4	−2	−0.9592991E − 03
4	0	−0.4952142E − 02
4	2	−0.2436407E − 01
4	4	−0.3230413E − 01
6	−6	0.3422329E − 04
6	−4	0.1810159E − 04
6	−2	0.4855725E − 04
6	0	0.2270114E − 04
6	2	−0.1666892E − 04
6	4	0.6830792E − 04
6	6	−0.6617125E − 04