File:Ca(aq)6 improved image.tif|Structure of the polymeric [Ca(H{{sub|2}}O){{sub|6}}]{{sup|2+}} center in hydrated calcium chloride, illustrating the high coordination number typical for calcium complexes. | File:Ca(aq)6 improved image.tif|Structure of the polymeric [Ca(H{{sub|2}}O){{sub|6}}]{{sup|2+}} center in hydrated calcium chloride, illustrating the high coordination number typical for calcium complexes. |