Ice

Ice is water that is frozen into a solid state, typically forming at or below temperatures of 0 °C, 32 °F, or 273.15 K. It occurs naturally on Earth, on other planets, in Oort cloud objects, and as interstellar ice. As a naturally occurring crystalline inorganic solid with an ordered structure, ice is considered to be a mineral. Depending on the presence of impurities such as particles of soil or bubbles of air, it can appear transparent or a more or less opaque bluish-white color. Virtually all of the ice on Earth is of a hexagonal crystalline structure denoted as ice Iₕ. Depending on temperature and pressure, at least nineteen phases can exist. The most common phase transition to ice Iₕ occurs when liquid water is cooled below 0 °C at standard atmospheric pressure. When water is cooled rapidly, up to three types of amorphous ice can form. Interstellar ice is overwhelmingly low-density amorphous ice, which likely makes LDA ice the most abundant type in the universe.

Data Source : Wikipedia