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Preferred Label : dilational transition;

Detailed label : dilational (dilatational) transition;

IUPAC definition : A transition in which the crystal structure is dilated (or compressed) along one (or more) crystallographic direction(s) while the symmetry about that direction is retained. Examples: ol li The transition of a CsCl-type structure to a rock salt structure in which dilation occurs along the three-fold axis. /li li The transition at T D in quenched NiS in which volume expansion occurs without change of symmetry on going from a metallic state (T T D) to a semiconducting state (T T D). /li /ol ;

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A transition in which the crystal structure is dilated (or compressed) along one (or more) crystallographic direction(s) while the symmetry about that direction is retained. Examples: ol li The transition of a CsCl-type structure to a rock salt structure in which dilation occurs along the three-fold axis. /li li The transition at T D in quenched NiS in which volume expansion occurs without change of symmetry on going from a metallic state (T T D) to a semiconducting state (T T D). /li /ol

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30/07/2025


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