Table 1: Positional and thermal parameters of ferroelectric phase (A21am) of SrBi2Ta2O9 at 300 K [25].

Atom

Sr00.261000.69 (1)
Bi0.4833 (14)0.7738 (4)0.2011 (1)1.77 (1)
Ta0.5177 (16)0.7468 (6)0.4143 (1)0.37 (1)
O(1)0.5365 (89)0.3335 (67)01.04 (5)
O(2)0.4904 (72)0.7316 (49)0.3402 (4)1.55 (4)
O(3)0.7057 (76)0.0146 (130)0.2623 (5)0.85 (4)
O(4)0.7523 (94)0.0002 (101)0.0730 (6)0.62 (5)
O(5)0.7854 (87)0.9744 (93)0.5850 (6)0.91 (4)