Crystal structure and phase transition in the perovskite-type layer molecular composite NH3(CH2)4NH3PbCl4

作者：Christiane Courseille, N. B. Chanh, Thierry Maris, Abdelaziz Daoud, Y. Abid, Michel S. Laguerre · 发表于：physica status solidi (a) · 年份：1994 · DOI：10.1002/pssa.2211430202 · 被引用次数：27 · 研究领域：Solid-state spectroscopy and crystallography、Perovskite Materials and Applications、Nonlinear Optical Materials Research

The crystal structure of NH3(CH2)4NH3PbCl4 at room temperature (RT phase) is determined by X-ray diffraction. The structural arrangement is of two-dimensional type, with ammonium alkylene chains located in between corner-sharing PbCl6 octahedra layers. The connection between the inorganic and organic parts of the structure is assumed by hydrogen bonds of N–H…Cl type. The crystallographic data are: monoclinic, space group P21/c, Z = 4, a = 0.7944(2) nm, b = 0.7772(5) nm, c = 1.9761(8) nm, β = 94.84(3)°. The organic chain is not centrosymmetrical and shows a left-hand conformation at one extremity. The presence of a phase transition is evidenced at T = 323.8 K by calorimetric and diffraction methods. The crystallographic data of the high-temperature phase (HT form) are obtained from single and powder crystal investigations: monoclinic, space group P21/a, Z = 2, a = 0.7963(5) nm, b = 0.7735(6) nm, c = 1.1011(1) nm, β = 102.22(9)°.