Water can be solid at room temperature, as long as it’s held at enormous pressures, such as when trapped inside a diamond lattice: https://en.wikipedia.org/wiki/Ice_VII#Natural_occurrence
Different temperatures and pressures can result in many distinct kinds of water ice, as listed here: https://en.wikipedia.org/wiki/Ice#Phases
But if we’re talking about atmospheric pressure, we’re stuck with the familiar kind of water ice: https://en.wikipedia.org/wiki/File:Phase_diagram_of_water.svg
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