All metals, most ceramics and some polymers form crystals when the material is frozen. By this we mean that the atoms arrange themselves regularly and repeatedly in three-dimensional pattern. This kind of structure called a crystal.
Regular pattern in the long run involving tens of atomic distances generated by the coordination of atoms in the material. Besides, this pattern is sometimes also determines the outer shape of the crystals, examples of which can be expressed are six stars form snowflakes. Flat surfaces of rocks precious stones, crystal quartz (SiO 2) even ordinary table salt (NaCl) is the outward appearance of the arrangement in the crystal itself. In every instance that was pointed out, the atomic arrangement in the crystals exist even at the outer surface shape change. Crystallographic structures of quartz in the outer surface do not change even though it rubbed so as to form rounded grains of sand beaches round. The same thing we encountered on the hexagonal arrangement of water molecules in ice or frost.
Unit cell, Tata length range that is characteristic of crystals. This model shows some atomic lattice pattern that can occur when there is one kind of atom. Because the pattern of atoms is repeated ad infinitum, to further ease the crystal lattice is divided in the unit cell. This unit cell has a finite volume; each has features in common with the crystal as a whole.
Regular pattern in the long run involving tens of atomic distances generated by the coordination of atoms in the material. Besides, this pattern is sometimes also determines the outer shape of the crystals, examples of which can be expressed are six stars form snowflakes. Flat surfaces of rocks precious stones, crystal quartz (SiO 2) even ordinary table salt (NaCl) is the outward appearance of the arrangement in the crystal itself. In every instance that was pointed out, the atomic arrangement in the crystals exist even at the outer surface shape change. Crystallographic structures of quartz in the outer surface do not change even though it rubbed so as to form rounded grains of sand beaches round. The same thing we encountered on the hexagonal arrangement of water molecules in ice or frost.
Unit cell, Tata length range that is characteristic of crystals. This model shows some atomic lattice pattern that can occur when there is one kind of atom. Because the pattern of atoms is repeated ad infinitum, to further ease the crystal lattice is divided in the unit cell. This unit cell has a finite volume; each has features in common with the crystal as a whole.
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