| 释义 |
morphotropy Cryst.|mɔːˈfɒtrəpɪ|
[ad. G. morphotropie (P. Groth 1870, in Ann. d. Physik und Chem. CXLI. 39), f. Gr. µορϕ-ή form + τροπή turning.]
(The study of) the progressive change in crystal structure brought about by replacing one of the species of atom or radical in a crystal by other species.
1900Rep. Brit. Assoc. Adv. Sci. 1900 167 Morphotropy and isomorphism have a common cause, and..this is more likely to be discovered by the crystallographic study of substances showing morphotropic relationships than from the examination merely of materials likely to exhibit isomorphism. 1924W. S. Stiles tr. F. Rinne's Crystals & Fine Struct. Matter ix. 105 P. v. Groth has founded the science of morphotropy. By comparing crystalline forms, he succeeded in showing how the replacement of H by (OH), NO2, NH2, CH3, Cl, in benzene (C6H6) manifests itself in changes of corresponding angles, and ultimately the symmetry. 1939R. C. Evans Introd. Crystal Chem. iii. 60 The structural importance of the quantitative lattice theory..lies in the light which it throws on..the problems of polymorphism and morphotropy.
So morphoˈtropic a., characteristic of or exhibiting morphotropy.
1899Mineral. Mag. XII. 66 The three minerals may be members of a morphotropic series, in which the vertical crystallographic axis increases in length with an increase in the amount of lead. 1937W. L. Bragg Atomic Struct. Minerals ix. 150 The members of the chondrodite series are interesting because of the morphotropic relationships which exist between them. 1959tr. W. F. de Jong's Gen. Crystallogr. 184 A morphotropic range of compounds is one in which the replacing atoms differ gradually in one property—for example, in size or polarizability. 1973A. I. Kitaigorodsky Molec. Crystals & Molecules i. 18 Morphotropic changes associated with a loss of symmetry are accompanied by an increase in the packing density. |
