Fig. 6: Temperature variation of the unit cell parameters of La1−xCaxMnO3 compound with x = 0.53, 0.57, and 0.6.

The arrows denote the charge-ordering transitions located at the temperatures where the slope of each b(T) curve is at a maximum. Error bars are smaller than the data points (the standard deviations have been calculated by fullprof program as described in the fullprof manual page 43).