Investigation of structural and thermal evolution in novel layered perovskite NdSrMn2O5+δ via neutron powder diffraction and thermogravimetric analysis
Artikel i vetenskaplig tidskrift, 2020

Neutron diffraction is one of the best methods for structural analysis of a complex, layered perovskite material with low symmetry by accurately detecting the oxygen positions through octahedral tilting. In this research, the crystal structure of NdSrMn2O5+δ was identified through X-ray diffraction (XRD) and neutron powder diffraction (NPD) at room temperature (RT), which indicated the formation of a layered structure in orthorhombic symmetry in the Pmmm (no. 47) space group. Rietveld refinement of the neutron diffraction data has confirmed the orthorhombic symmetry with unit cell parameters (a = 3.8367 (1) Å, b = 3.8643 (2) Å, and c = 7.7126 (1) Å), atomic positions, and oxygen occupancy. Thermogravimetric analysis revealed the total weight loss of about 0.10% for 20–950°C temperature, which occurred mainly to create oxygen vacancies at high temperatures. Rietveld analyses concurred with the XRD and neutron data allowing correlation of occupancy factors of the oxygen sites.


Shammya Afroze

Universiti Brunei Darussalam

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi 2

Duygu Yilmaz

Md Sumon Reza

Universiti Brunei Darussalam

Paul Henry

Uppsala universitet

STFC Rutherford Appleton Laboratory

Q. Cheok

Universiti Brunei Darussalam

Juliana H. Zaini

Universiti Brunei Darussalam

A. K. Azad

Universiti Brunei Darussalam

Alibek Issakhov

Al Farabi Kazakh National University

Milad Sadeghzadeh

University of Tehran

International Journal of Chemical Engineering

1687-806X (ISSN) 1687-8078 (eISSN)

Vol. 2020 6642187


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