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. Author manuscript; available in PMC: 2015 Jul 28.
Published in final edited form as: RSC Adv. 2015 Mar 27;5:36614–36633. doi: 10.1039/C4RA17180B

Fig.8.

Fig.8

Energy levels corresponding to different arrangements of OH- groups inside the c-axis channel for different lattice space groups: P63 ferroelectric, P21 ferroelectric and P21/b anti-ferroelectric. Reprinted with permission from Ref.65.