| 释义 |
monotropy Physical Chem.|məˈnɒtrəpɪ|
[ad. G. monotropie (O. Lehmann Molekularphysik (1888) I. 119), f. Gr. µονο- mono- + τροπή turning.]
The existence of two polymorphs of a substance, one of which is stable and the other metastable over the whole range of their existence, so that conversion of the latter into the former can occur but not vice versa.
1902A. Findlay tr. Ostwald's Princ. Inorg. Chem. 255 (heading) Enantiotropy and monotropy. 1932J. N. Friend Text-bk. Physical Chem. I. xi. 181 It may..so happen that, in certain cases of presumed monotropy, the transition point lies very much below the melting point and has not been realised experimentally for this reason. 1970Chakravarti & Mitra Textbk. Physical Chem. I. vi. 232 Examples of monotropy are white and violet phosphorus, diamond and graphite, silica, iodine monochloride [and] α- and β-benzophenone. |
