enantiotropyn.

/ɛˌnantɪˈɒtrəpi/

Etymology: < German enantiotropie (O. Lehmann Molekularphysik (1888) I. 119), < Greek ἐναντίος opposite + τροπή turning.

Physical Chemistry.

The existence of two stable polymorphs of a substance which at a certain transition temperature are interconvertible.

ΚΠ

1900 Jrnl. Chem. Soc. 78 ii. 83 Enantiotropy of Tin.

1904 A. Findlay Phase Rule 42.

1948 S. Glasstone Textbk. Physical Chem. (ed. 2) vi. 469 Two crystalline forms of a substance are said to be enantiotropic, or to exhibit enantiotrophy, when each has a definite range of stability, and the change from one form to the other takes place at a definite temperature in either direction.

Derivatives

enantioˈtropic adj.

ΚΠ

1903 H. C. Jones Princ. Inorg. Chem. 172 Substances which like sulphur exist in two phases of the same state of aggregation, and the two phases can be reciprocally transformed into one another by changing the temperature, are known as enantiotropic.

1937 Nature 31 July 202/2 Barium carbonate shows an enantiotropic change at 800° from the rhombic to the hexagonal form.

This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018).

单词	enantiotropy
释义	enantiotropyn. /ɛˌnantɪˈɒtrəpi/ Etymology: < German enantiotropie (O. Lehmann Molekularphysik (1888) I. 119), < Greek ἐναντίος opposite + τροπή turning. Physical Chemistry. The existence of two stable polymorphs of a substance which at a certain transition temperature are interconvertible. ΚΠ 1900 Jrnl. Chem. Soc. 78 ii. 83 Enantiotropy of Tin. 1904 A. Findlay Phase Rule 42. 1948 S. Glasstone Textbk. Physical Chem. (ed. 2) vi. 469 Two crystalline forms of a substance are said to be enantiotropic, or to exhibit enantiotrophy, when each has a definite range of stability, and the change from one form to the other takes place at a definite temperature in either direction. Derivatives enantioˈtropic adj. ΚΠ 1903 H. C. Jones Princ. Inorg. Chem. 172 Substances which like sulphur exist in two phases of the same state of aggregation, and the two phases can be reciprocally transformed into one another by changing the temperature, are known as enantiotropic. 1937 Nature 31 July 202/2 Barium carbonate shows an enantiotropic change at 800° from the rhombic to the hexagonal form. This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018). < n.1900
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