Figure 2
(a) A view of the title structure in the twelve-orientation model [5a]. (b) A view of the arrangement of the disordered nitrate [NO3]− anions in the twelve-orientation model [5a]. (c) A view of the arrangement of the disordered nitrate [NO3]− anions in the eight-orientation aragonite model [1a]. The displacement parameters are shown at the 50% probability level. N atoms are coloured blue and O red (DIAMOND; Brandenburg, 2005). |