Ice Ic is a
metastableMetastability is a general scientific concept which describes states of delicate equilibrium. A system is in a metastable state when it is in equilibrium but is susceptible to fall into lower-energy states with only slight interaction...
cubicThe cubic crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals....
crystalline variant of
iceIce is a solid phase, usually crystalline, of a non-metallic substance that is liquid or gas at room temperature, such as carbon dioxide ice , ammonia ice, or methane ice. However, the predominant use of the term ice is for water ice, technically restricted to one of the 15 known crystalline phases...
. The
oxygenOxygen Oxygen Oxygen (acid, literally "sharp", from the taste of acids) and -γενής (-genēs) (producer, literally begetter) is the element with atomic number 8 and represented by the symbol O...
atoms are arranged in a
diamondIn mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is the second most stable form of carbon, after graphite; however, the conversion rate from diamond to graphite is...
structure. It is produced at temperatures between 130-150 K, and is stable for up to 200 K, when it transforms into
ice IhIce I
h is the hexagonal crystal form of ordinary ice, or frozen water. Virtually all ice in the biosphere is ice I
h, with the exception only of a small amount of ice I
c which is occasionally present in the upper atmosphere...
. It is occasionally present in the upper atmosphere.
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Ice Ic is a
metastableMetastability is a general scientific concept which describes states of delicate equilibrium. A system is in a metastable state when it is in equilibrium but is susceptible to fall into lower-energy states with only slight interaction...
cubicThe cubic crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals....
crystalline variant of
iceIce is a solid phase, usually crystalline, of a non-metallic substance that is liquid or gas at room temperature, such as carbon dioxide ice , ammonia ice, or methane ice. However, the predominant use of the term ice is for water ice, technically restricted to one of the 15 known crystalline phases...
. The
oxygenOxygen Oxygen Oxygen (acid, literally "sharp", from the taste of acids) and -γενής (-genēs) (producer, literally begetter) is the element with atomic number 8 and represented by the symbol O...
atoms are arranged in a
diamondIn mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is the second most stable form of carbon, after graphite; however, the conversion rate from diamond to graphite is...
structure. It is produced at temperatures between 130-150 K, and is stable for up to 200 K, when it transforms into
ice IhIce I
h is the hexagonal crystal form of ordinary ice, or frozen water. Virtually all ice in the biosphere is ice I
h, with the exception only of a small amount of ice I
c which is occasionally present in the upper atmosphere...
. It is occasionally present in the upper atmosphere.
Ordinary water ice is known as ice I
h, (in the
BridgmanPercy Williams Bridgman was an American physicist who won the 1946 Nobel Prize in Physics for his work on the physics of high pressures. He also wrote extensively on the scientific method and on other aspects of the philosophy of science.- Biography :Bridgman entered Harvard University in 1900,...
nomenclature). Different types of ice, from
ice IIIce II is a rhombohedral crystalline form of ice with highly ordered structure. It is formed from ice Ih by compressing it at temperature of 198 K at 300 MPa or by decompressing ice V. When heated it undergoes transformation to ice III....
to
ice XIVIce XIV is a orthorhombic crystalline phase of ice. It is obtained by cooling liquid water to 118 K at a pressure of 1.2 GPa. It is the proton-ordered form of ice XII....
, have been created in the laboratory at different temperatures and pressures.