Combined Structural Refinement of Bi_3.5La_0.5Ti₃O₁₂ Using Neutron and X‐Ray Powder Diffraction Data.

Abstract

Data. -The title compound is characterized by Raman spectroscopy, powder neutron diffraction, and powder XRD at 298 K. The La atoms are located only on Bi sites in the perovskite units. The refinement results and spontaneous polarization calculations indicate that a monoclinic model (space group B1a1) is more suitable than an orthorhombic model (space group B2cb) as crystal system of the title compound. -(JEON, M. K.; KIM, Y.-I.; NAHM, S.-H.; WOO*, S. I.; J. Phys. Chem. B 109 (2005) 2, 968-972; Dep.

Microstructural, structural and electrical properties of La3+-modified Bi4Ti3O12 ferroelectric ceramics

“…1,2,5,18 Meanwhile, below T m in the ferroelectric phase, BIT-based compounds have been treated as either orthorhombic (OR) or monoclinic (MO), 1,2,4,[18][19][20] provided that the deviation between both systems is in this case small and often hardly detectable. In the present work, we chose to fit the exper- imental XRD patterns of the prepared BLT ceramics through the "Le Bail" method, 21 using the professional Full Proof program, from which the values of lattice parameters (a, b, c, α, β and γ) and resulting volume (V) were automatically obtained.…”