Table 1 The structural parameters extracted from the Rietveld refinement of XRD data for the LaFeO₃, La_0.70Eu_0.30FeO₃ and La_0.70Eu_0.30Fe_0.95Cr_0.05O₃ nanoparticles recorded at room temperature. Space group: Pbnm (62) and the R-Factors have their normal significance and relate to regions of the profile at which Bragg peaks contribute. R_p < 7.91%, R_wp < 7.99%, R_exp < 6.77%, χ² ~ 1.483.

a (Å)

5.5549(2)

5.5019(5)

5.5006(2)

b (Å)

5.5608(1)

5.5682(2)

5.5671(4)

c (Å)

7.8472(3)

7.8089(6)

7.8067(1)

c/2 (Å)

5.5488(2)

5.5217(5)

5.5202(3)

Volume (Å)³

242.396(1)

239.234(3)

239.056(4)

Calc. density (g/cm³)

6.652(4)

6.849(1)

6.848(5)

Crystallite size (nm)

31(1)

28(1)

36(1)

Microstrain (%)

0.000(2)

0.20(2)

0.58(3)

(Fe/Cr)-O1 (Å)

2.002(9)

1.9818(2)

1.9705(2)

(Fe/Cr)-O2 (Å)

1.990(3)

1.9120(2)

1.9243(2)

(Fe/Cr)-O2 (Å)

2.005(3)

2.1060(2)

2.1209(2)

(Fe/Cr)-O1-(Fe/Cr) (°)

156.931(1)

160.182(2)

164.130(2)

(Fe/Cr)-O2-(Fe/Cr) (°)

161.621(1)

153.827(2)

150.595(3)

O1-(Fe/Cr)-O2 (°)

89.4, 87.7

85.3, 89.4

79.4, 84.9

O2-(Fe/Cr)-O2 (°)

89.2, 90.8

88.2, 91.8

87.1, 92.9

(Fe/Cr)O₆ volume (Å)³

10.569 (2)

10.599(4)

10.493(3)