<P> A plastic crystal is a molecular solid with long - range positional order but with constituent molecules retaining rotational freedom; in an orientational glass this degree of freedom is frozen in a quenched disordered state . </P> <P> Similarly, in a spin glass magnetic disorder is frozen . </P> <P> Liquid crystal states have properties intermediate between mobile liquids and ordered solids . Generally, they are able to flow like a liquid, but exhibiting long - range order . For example, the nematic phase consists of long rod - like molecules such as para-azoxyanisole, which is nematic in the temperature range 118--136 ° C. In this state the molecules flow as in a liquid, but they all point in the same direction (within each domain) and cannot rotate freely . Like a crystalline solid, but unlike a liquid, liquid crystals react to polarized light . </P> <P> Other types of liquid crystals are described in the main article on these states . Several types have technological importance, for example, in liquid crystal displays . </P>

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