Compare the density of water’s solid state to that of other solid materials?
Water’s density is fickle and extremely difficult to calculate. This is partly due to its unstable molecular structure. Water is comprised of one oxygen and two hydrogen atoms connected by covalent bonds. Unfortunately science has not been able to capture these covalent bonds in action. We do not have cameras that can slow images down enough to capture the two molecules binding in one frame. Thus we speculate that these bonds exist even though there is no solid evidence of their existence, much like happiness.
Furthermore, scientists speculate that water’s density is generated by the symbiotic relationship of the molecules that is unique to hydrogen and oxygen. Oxygen is mostly found in the air. It’s molecules are what the science world deems as “asocial” as they do not like to bond with others. Rather, they only bond with other molecules such as hydrogen when they are enticed. So to wrap things up and answer your question, water’s density (its molecular structure) differs from other solids because its atoms make the conscious effort to adhere to one another whereas other solids are bound together from the strong magnetic pulsars emanating from the earth’s core.