Published online by Cambridge University Press: 10 January 2013
Two compounds, [Co(NH3)5CO3]NO3·1/2H2O (labeled A) and [Co(NH3)4CO3]NO3·1/2H2O (labeled B), were obtained and characterized by X-ray powder diffraction. The samples were indexed using the programs TREOR90 and DICVOL91. In a monoclinic setting, the cell parameters are a=7.6661(3) Å, b=9.6212(3) Å, c=7.0725(4) Å, β=106.261(4)°, V=500.78 Å3, M20=36, F30=65 (0.0106, 44) for A and a=10.5623(5) Å, b=22.7304(18) Å, c=7.5174(5) Å, β=91.350(5)°, V=1804.31 Å3, M20=36, F30=82 (0.0071, 52) for B. The space group is probably P21/m(11) for A and P21/n(14) for B according to their reflection conditions.