Investigation of Structural and Thermal Evolution in Novel Layered Perovskite NdSrMn₂O_5+δ via Neutron Powder Diffraction and Thermogravimetric Analysis

Table 1

Comparison of the results obtained from the Rietveld analysis of NPD data for NdSrMn₂O_5+δ at RT (space group, Pmmm) with other data from the literature.

Parameters	NdSrMn2O5+δ at RT	NdBaMn2O5+δ at 25°C	YBaMn2O5 at 25°C	PrSrMn2O5+δ at RT
Structure model	Orthorhombic	Tetragonal	Tetragonal	Orthorhombic
Space group	Pmmm	P4/nmm	P4/mmm	Pmmm
Volume (Å^3)	416.8110	—	—	480.9290
R-factors
Rf (%)	5.50	—	—	—
Rp (%)	4.87	2.21	—	—
Rwp (%)	6.86	—	6.00	—
Cell parameters
a (Å)	3.8367 (1)	5.6140 (1)	3.9186 (2)	3.8906 (1)
b (Å)	3.8643 (2)	5.6140 (1)	3.9186 (2)	3.8227 (1)
c (Å)	7.7126 (1)	7.7430 (2)	7.6540 (5)	7.6846 (2)

NdBaMn₂O_5+δ [41], YBaMn₂O₅ [42], PrSrMn₂O_5+δ [30].