Editing Neutron diffraction (section)

=== Phase transition in ferroelectrics ===
Neutron diffraction has been widely employed to understand phase transitions in materials including [[ferroelectrics]], which show the transition of crystal structure with [[temperature]] or [[pressure]]. It can be utilised to study the ferroelectric [[phase transition]] in [[lead titanate]] (PbTiO<sub>3</sub>). It can be used to analyse [[Atomic displacement parameter|atomic displacements]] and corresponding lattice distortions. <ref>{{Cite journal |last1=Jorio |first1=A. |last2=Currat |first2=R. |last3=Myles |first3=D. A. A. |last4=McIntyre |first4=G. J. |last5=Aleksandrova |first5=I. P. |last6=Kiat |first6=J. M. |last7=Saint-Grégoire |first7=P. |date=2000 |title=Ferroelastic phase transition in Cs 3 Bi 2 I 9 : A neutron diffraction study |url=https://journals.aps.org/prb/abstract/10.1103/PhysRevB.61.3857 |journal=Physical Review B |language=en |volume=61 |issue=6 |pages=3857–3862 |doi=10.1103/PhysRevB.61.3857 |issn=0163-1829|url-access=subscription }}</ref>