Short range order refers to the regular and predictable arrangement of the atoms over a short distance, usually with one or two atom spacings. However, this regularity does not persist over a long distance. Examples of materials with short range order include amorphous materials such as
wax
Waxes are a diverse class of organic compounds that are lipophilic, malleable solids near ambient temperatures. They include higher alkanes and lipids, typically with melting points above about 40 °C (104 °F), melting to give low ...
,
glass
Glass is a non-crystalline, often transparent, amorphous solid that has widespread practical, technological, and decorative use in, for example, window panes, tableware, and optics. Glass is most often formed by rapid cooling (quenching) of ...
and
liquids
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. As such, it is one of the four fundamental states of matter (the others being solid, gas, an ...
as well as the collagen fibrils of the stroma in the cornea.
Besides ordering of atoms, short-range ordering of vacancies are also possible. Example of systems with short-range ordering of oxygen-vacancies include oxygen-deficient stoichiometries of the superconductors YBa
2Cu
2O
7−δ, Nd
2−xCe
xCuO
4−y; as well as perovskites and novel bismuth sillenites.
[Scurti, Craig A., et al. "Electron diffraction study of the sillenites Bi12SiO20, Bi25FeO39 and Bi25InO39: Evidence of short-range ordering of oxygen-vacancies in the trivalent sillenites." AIP Advances 4.8 (2014): 087125. , https://doi.org/10.1063/1.4893341]
See also
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Order and disorder
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Structure of liquids and glasses
The structure of liquids, glasses and other non-crystalline solids is characterized by the absence of long-range order which defines crystalline materials. Liquids and amorphous solids do, however, possess a rich and varied array of short to medi ...
References
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Statistical mechanics