Synthesis and pore structure construction mechanism of porous nesquehonite

Formation and Phase Transformation of MgCO3·3H2O Whiskers in the Presence of Sodium Dodecyl Sulfate

“…In the [010] direction, the [MgO 6 ] regular octahedrons are connected by the Mg–O bonds in a common vertex manner (Figure c). According to the Pauling rule, , the growth surfaces of [MgO 6 ] regular octahedrons connect by the vertex-sharing or edge-sharing, especially the planes-sharing, will reduce the stability of the coordination crystal structure and sequentially decrease the growth rate. Therefore, the growth unit of [MgO 6 ] regular octahedron will spontaneously grow fastest along the [010] direction.…”

“…The two coordination octahedrons are joined by [CO 3 ] triangles or co-vertices or co-edges, and the total number of vertices is less than that in the structure of MgCO 3 ·3H 2 O (Figure ). Pauling rule , points out that in the coordination structure, the distance of the central cations is lengthened by the reduce of the number of common vertices. Moreover, the Coulomb repulsion of the central cations will be weakened, which can lead to a strengthen of the structural stability.…”