Snowflake SVG e is a frozen water crystal in the form of a hexagonal polyhedron. At temperatures of thirty degrees Celsius, light frozen water crystals fall as precipitation on the ground, forming a snow cover on it. Crystals are formed in frozen clouds when they move from a vapor-like state to a frozen, crystalline, solid phase. The formation and growth of water crystals – snowflakes – are directly affected by the temperature and humidity of the surrounding air.
The process of “birth” and snowflake SVG formation.
In clouds, at the temperature of air falling below fifteen degrees under the zero mark, crystals of frozen water are formed. The framework, or core of these crystals, is microscopic ice floes. When water molecules join the core, they give the snowflake a hexagonal shape. This form of snowflake depends on the molecular structure of water and its unusual properties. It is a pyramid that contains oxygen in its center, and on top of it there is hydrogen. The snowflake is an ice crystal that has grown rapidly in non-equilibrium conditions. Hexagons tend to grow along their axis, as well as can easily grow and perpendicular to this axis. As a result of this process, it is possible to form snowflakes of different shapes and sizes. These are very different crystalline formations taking the form of hexagonal stars, columns or needles.
At different times and with very different fields of activity, researchers were interested in the structure and properties of snowflakes. For example, in the first half of the seventeenth century, an outstanding scientist of his time, astronomer I. Kepler, created a treatise with a detailed description of hexagonal snowflakes. Some time later, the famous scientist – R.Guk – presented for publication the drawings of snowflakes of different shapes, made by him himself. In the second half of the nineteenth century, the American scientist U. Bentley, for the first time and very successfully, photographed snowflakes under a microscope. Subsequently, Liebrecht and Nakaya developed the theory of a direct dependence of the unique form of snowflakes on the external factors surrounding it – humidity and air temperature. They confirmed this in their experiments in laboratory conditions. For this purpose, they grew ice crystals in their laboratory, and studied in detail the entire process of “birth” and “growth” of snowflakes. These works by Kenneth Liebrecht can be seen on SnowCrystals.com.
In the snowflake, at the same time, both order and chaos coexist together. With a hexagonal grid, the oxygen atoms in the snowflake are in order and the hydrogen atoms are in total chaos. The snowflake has its unique shape and even edges, due to the special orientation of molecules in the lattice and the location of free hydrogen bonds. When the vapour molecules fill the void around them, the snowflakes take on a shape with even edges. They fly from the sky at a relatively low humidity and this does not depend, now, on the temperature of the surrounding air.
During the flight of the snowflake SVG, on its edges appear characteristic irregularities. Each of the irregularities attracts water molecules and the snowflake gradually increases. Before it falls to the ground, the snowflake flies for a long time. At this time, it is more likely to come into contact with new and new water molecules with its convex tubercles than faces. As a result, on this basis, fat rays grow very quickly from each facet. At the same time, small, multiple branches are formed on the hillocks of the ray. In flight, absolutely all the facets of a single snowflake are in identical conditions that contribute to their even growth and the formation of rays on absolutely all the facets of the snowflake. In ideal conditions of specialized laboratories, there is a symmetrical growth of all six rays of snowflake and branches of snowflake rays also grow symmetrically. In the natural atmosphere of the earth, the snowflake’s growth is subject to the natural conditions that exist in accordance with the laws of nature. Snowflakes are so-called irregular crystals, and therefore only a part of the six guiding rays has a tendency to symmetry.
What makes snow white? After all, forming from water crystals, which are transparent, it should be colorless too! Simply when the sunlight freezes, passing through the snowflake SVG, partially loses the rays of the spectrum of red and yellow, they are not reflected, and only the rays of blue, bright blue or blue-green become visible. It is the physical properties of water that determine the color of snow. Ninety-five per cent of the snowflake is made up of air, so that when it passes between the crystals, the light is reflected by their multi-faceted surfaces, then scattered in the air between the crystals and becomes white.
But snow can be not only white, it changes its color if it contains some impurities that can easily get into it from anywhere. In the mountains and the Arctic, there is often snow in pink or even red. This is due to algae that have settled down and live well between the crystals of snow. In 1969, many people in Sweden witnessed the black snow falling from the sky, which was stained with industrial smoke and soot emissions into the air. And when in 1955 in one of the states of the USA there was a snow glowing in the darkness, the reason for this phenomenon could not be explained!