The atomic coordinations, occupancies and isotropic displacement parameters as determined by Rietveld refinement for Ba₂Y_4.2Eu_0.8B₅O₁₇.

Atom	x	y	z	Occ.	Uiso (Å2)	Wyck.
Ba1	0.33581	0.02396	0.18393	0.90943	−0.00532	8d
Y1	0.33581	0.02396	0.18393	0.90943	−0.00532	8d
Ba2	0.5	0.41124	0.75	0.2	0.01275	4c
Eu	0.5	0.41124	0.75	0.8	0.01275	4c
Y3	0.18165	0.04629	0.41451	1	−0.02461	8d
Y4	0.01607	0.76051	0.47887	1	0.0088	8d
B1	0.15138	0.52964	0.40624	1	−0.09	8d
O1	0.19532	0.38553	0.41003	1	−0.072	8d
O2	0.14487	0.7102	0.40012	1	0.01301	8d
O3	0.08387	0.45757	0.49893	1	0.0003	8d
B2	0.69329	0.58445	0.77545	1	−0.06048	8d
O4	0.67945	0.4438	0.75562	1	0.0293	8d
O5	0.61289	0.3519	0.8842	1	−0.00301	8d
O6	0.69615	0.58683	0.91213	1	−0.03713	8d
O7	0.94229	0.89496	0.5666	1	−0.0122	8d
O8	0.0274	0.26356	0.67037	1	−0.055	8d
O9	0.5	0.94764	0.25	1	−0.04744	4c
B3	0.0	0.63778	0.25	1	−0.09	4c