Ice crystals

ice crystalicecrystallinecrystalsfrozen crystals
Ice crystals are solid ice exhibiting atomic ordering on various length scales and include hexagonal columns, hexagonal plates, dendritic crystals, and diamond dust.wikipedia
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Ice

water iceicyglacier ice
Ice crystals are solid ice exhibiting atomic ordering on various length scales and include hexagonal columns, hexagonal plates, dendritic crystals, and diamond dust.
Liquid water is densest, essentially 1.00 g/cm 3, at 4 °C and becomes less dense as the water molecules begin to form the hexagonal crystals of ice as the freezing point is reached.

Diamond dust

ice crystalsice needles
Ice crystals are solid ice exhibiting atomic ordering on various length scales and include hexagonal columns, hexagonal plates, dendritic crystals, and diamond dust.
This meteorological phenomenon is also referred to simply as ice crystals and is reported in the METAR code as IC.

Ice fog

Ice clouds are composed of ice crystals, the most notable being cirrus clouds and ice fog.
Ice fog is a type of fog consisting of fine ice crystals suspended in the air.

Cirrus cloud

cirruscirrus cloudsCirriform
Ice clouds are composed of ice crystals, the most notable being cirrus clouds and ice fog.
Cirrus clouds range in thickness from 100 m to 8000 m, with an average thickness of 1500 m. There are, on average, 30 ice crystals per liter (96 ice crystals per gallon), but this ranges from one ice crystal per 10,000 liters (3.7 ice crystals per 10,000 gallons) to 10,000 ice crystals per liter (37,000 ice crystals per gallon), a difference of eight orders of magnitude.

Snowflake

snowflakessnow flakeflakes
A snowflake is a single ice crystal that has achieved a sufficient size, and may have amalgamated with others, then falls through the Earth's atmosphere as snow.

Hexagonal crystal family

Trigonalhexagonalrhombohedral
Ice crystals are solid ice exhibiting atomic ordering on various length scales and include hexagonal columns, hexagonal plates, dendritic crystals, and diamond dust. Common ice crystals are symmetrical and have a hexagonal pattern.

Dendrite (crystal)

dendritesdendritedendritic
Ice crystals are solid ice exhibiting atomic ordering on various length scales and include hexagonal columns, hexagonal plates, dendritic crystals, and diamond dust.

Deposition (chemistry)

depositiondepositeddeposits
The hugely symmetric shapes are due to depositional growth, namely, direct deposition of water vapour onto the ice crystal.

Crystal growth

growngrowthcrystal growing
The hugely symmetric shapes are due to depositional growth, namely, direct deposition of water vapour onto the ice crystal.

Needle ice

needles
Possible shapes for ice crystals are columns, needles, plates and dendrites.

Temperature

temperaturesair temperaturewarm
Temperature and humidity determine many different crystalline forms.

Humidity

humidspecific humidityabsolute humidity
Temperature and humidity determine many different crystalline forms.

Atmosphere

atmosphericatmospheresplanetary atmospheres
Ice crystals are responsible for various atmospheric optics displays.

Ice cloud

Ice clouds are composed of ice crystals, the most notable being cirrus clouds and ice fog.

Troposphere

troposphericdivergencemid-tropospheric
The slight whitening of a clear blue sky caused by ice crystals high in the troposphere can be a sign that a weather front (and rain) is approaching, as moist air is carried to high levels and freezes to ice crystals.

Weather front

frontal systemfrontal boundaryfront
The slight whitening of a clear blue sky caused by ice crystals high in the troposphere can be a sign that a weather front (and rain) is approaching, as moist air is carried to high levels and freezes to ice crystals.

Surface weather analysis

cold frontsurface analysissurface
The slight whitening of a clear blue sky caused by ice crystals high in the troposphere can be a sign that a weather front (and rain) is approaching, as moist air is carried to high levels and freezes to ice crystals.

Crystal structure

unit celllatticecrystal lattice
Common ice crystals are symmetrical and have a hexagonal pattern.

Graphene

anomalous quantum Hall effectDirac pointGraphene acquisition
Square ice crystals form at room temperature when squeezed between two layers of graphene.

Water vapor

water vapourvaporevaporation
The research derived from the earlier discovery that water vapor and liquid water could pass through laminated sheets of graphene oxide, unlike smaller molecules such as helium.

Graphite oxide

graphene oxide
The research derived from the earlier discovery that water vapor and liquid water could pass through laminated sheets of graphene oxide, unlike smaller molecules such as helium.

Helium

Hehelium IIsuperfluid helium
The research derived from the earlier discovery that water vapor and liquid water could pass through laminated sheets of graphene oxide, unlike smaller molecules such as helium.

Van der Waals force

van der Waalsvan der Waals forcesvan der Waals interactions
The effect is thought to be driven by the van der Waals force, which may involve more than 10,000 atmospheres of pressure.

Atmosphere (unit)

atmatmospheresatmosphere
The effect is thought to be driven by the van der Waals force, which may involve more than 10,000 atmospheres of pressure.

Snow