کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1517203 | 1511603 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-temperature structural evolution of caesium and rubidium triiodoplumbates
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: High-temperature structural evolution of caesium and rubidium triiodoplumbates High-temperature structural evolution of caesium and rubidium triiodoplumbates](/preview/png/1517203.png)
چکیده انگلیسی
CsPbI3 and RbPbI3 were investigated by in situ powder diffraction within temperature ranges of 298–687 K and 298–714 K, respectively. Both compounds crystallize in orthorhombic Pnma symmetry and expand isotropically upon a heating, revealing almost the same relative change of the lattice parameters. A pronounced difference in the structural evolution close to 600 K was observed, namely, CsPbI3 undergoes first-order reversible phase transformation Pnma ⟷563KPnma+Pm3¯m ⟷602KPm3¯m, whereas no transitions (except of the sample's melting) in RbPbI3 were detected. An attempt to clarify the relation between the existence/absence of a phase transition and bulging out of the iodine environment around alkaline ions was undertaken.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 69, Issue 10, October 2008, Pages 2520–2526
Journal: Journal of Physics and Chemistry of Solids - Volume 69, Issue 10, October 2008, Pages 2520–2526
نویسندگان
D.M. Trots, S.V. Myagkota,