Figure 2
Comparison of the crystal structures among (a) HT-CEn, (b) HP-CEn (Angel et al., 1992) and (c) L-CEn (Morimoto et al., 1960). Mg1O6 and SiO4 sites are shown by tetrahedral and octahedral descriptions, respectively. The spheres represent the Mg2 ions. Each coordination environment around the Mg2 site can be distinguished by the bonding to the O3 atoms labeled in Nos. 1–4. |