HABS-Silicate Controlled Synthesis of Worm-Like Calcite via Orientated Attachment

摘要

Worm-like calcite crystals were successfully synthesized by hydrothermal method in heavy alkylbenzene sulfonate (HABS)- silicate hybrid aqueous system at 45°C for 48 h. The result indicated that HABS can affect step/kink sites on the growth face of {104} calcite by alternating Ca2+ or CO3 2-Iayers, resulting a slight rotation or stacking faults of the subunits, which lead to the worm shape of crystalline aggregates by elongating parallel to the c-axis of the rhombohedral lattice. The overlapping worm structures were obtained with the synergistic effect of HABS and silicate, which presents an additives-mediated crystallographically self-assembly of worm- like units and also the inheritance of orientated attachment with rhombohedral calcite habits.