A seed crystal is a small piece of single crystal material from which a large crystal of, usually, the same material is to be grown. The large crystal can be grown by dipping the seed into a supersaturated solution, into molten material that is then cooled, or by growth on the seed face by passing vapour of the material to be grown over it. A single crystal is a crystalline solid in which the crystal lattice of the entire sample is continuous and unbroken to the edges of the sample. ... Quartz crystal A crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ... In physics, the term supersaturation or oversaturation refers to a solution that contains more of the dissolved material than could be dissolved by the solvent under existing circumstances. ...
Examples where the a seed crystal is used to grow large boules or ingots of a single crystal include the semiconductor industry where methods such as the Czochralski process or Bridgeman technique are employed. A boule is a term used to describe a single crystal ingot produced by synthetic means. ... An ingot is a mass of metal or semiconducting material, heated past the melting point, and then recast, typically into the form of a bar or block. ... A semiconductor is a material with an electrical conductivity that is intermediate between that of an insulator and a conductor. ... The Czochralski process is a method of crystal growth used to obtain single crystals of semiconductors (e. ... The Bridgeman technique is a method of growing single crystal ingots or boules. ...
Crystals are produced whenever a solid is formed gradually from a fluid, whether the formation results from the freezing of a liquid, the deposition of dissolved matter, or the direct condensation of a gas into solid form.
Crystal growth is attained when a minute crystal that has formed abstracts more of the same constituent from its environment.
The thirty-two classes are grouped into six crystal systems, based on the length and position of the crystal axes, imaginary lines passing through the center of the crystal, intersecting the faces, and bearing definite relations to the symmetry of the crystal.
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