Where could you find the solid form of water?

There are 15 known crystalline forms of water, one is called Ice [Ih]

which is normal hexagonal crystalline ice. Virtually all ice in the biOSphere is ice Ih, with the exception only of a small amount of ice Ic.

Ic is a metastable cubic crystalline variant of ice. The oxygen atoms are arranged in a diamond structure. It is produced at temperatures between 130 and 220 K, and can exist up to 240 K, when it transforms into ice Ih. It may occasionally be present in the upper atmosphere.