Least-squares refinements and error analysis based on correlated electron diffraction intensities of gaseous molecules

Average correlation coefficients for the electron diffraction intensities from the Oslo apparatus was computed. Simplified weight matrices P with P-kl depending only on vertical bar k-l vertical bar were calculated from the correlation coefficients and applied in least-squares refinements. The standard deviations obtained for rite structure parameters were typically from 1.2 to 2.5 times larger than those obtained with a diagonal weight matrix. while the more accurate parameters themselves suffered changes which seemed to be of lesser importance.