J. D. Bernal, E. Djatlowa, I. Kasarnowsky
1935
Citations
0
Influential Citations
13
Citations
Journal
Zeitschrift für Kristallographie - Crystalline Materials
Abstract
Strontium and Barium Peroxides are shown to have the Calcium Carbide structure and the size of the unit cells is given by: Strontium Peroxide α = 5.02 Á, c = 6.55 Á. Barium Peroxide a = 5.34 A, c = 6.77 A. The structures are confirmed by density measurements and by the comparison between the calculated and observed intensities, the results in both cases being very satisfactory. The distance between the centres of the oxygen atoms in the Ο2 ion are shown to be : Strontium Peroxide d0_0 = 1.35 Á Barium Peroxide d ^ = 1.29 Á. These distances are the length of the oxygen-oxygen single bond, the difference in the two cases being ascribed to contrapolarisation. Subject to allowances for this the length of the bond is taken to be : d^, = 1.31 ± 0.03 Á.