Reply to post: ...surely the density will be the same as the density on earth? h2o is h2o init?

...surely the density will be the same as the density on earth? h2o is h2o init?

Oh my, where to start. As you can see in the phase diagram, there are multiple forms of frozen ice, helpfully enumerated with Roman numbers from I to XV. But I guess for practical purposes, this type of density change is quite negligible if your water might be 90% of whatever they sell for sand up there on Mars.