| 单词 | juxtaposition twin |
| 释义 | > as lemmasjuxtaposition twin ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > crystal types > [noun] > composite crystals > twin > types of penetration twin1868 juxtaposition twin1883 multiple twin1932 the world > matter > chemistry > crystallography (general) > crystal (general) > crystal types > [noun] > composite crystals > twin > contactual union between twinned crystals juxtaposition1883 1883 Encycl. Brit. XVI. 366/1 In aragonite the crystals are partly interpenetrating, and partly merely in juxtaposition. 1890 G. H. Williams Elem. Crystallogr. ix. 185 Two individual crystals in twinning position are usually, though by no means always, united in a plane, which may or may not coincide with the twinning plane. Twins of this sort are called contact or juxtaposition twins. 1910 Encycl. Brit. VII. 582/2 In these two examples the surface of the union..is a regular surface coinciding with the twin-plane; such twins are called ‘juxtaposition-twins’. 1911 A. E. H. Tutton Crystallogr. xxvi. 420 In the case of ‘juxtaposition twins’ the plane of union, whether the twin plane or not, is known as the ‘plane of composition’. 1917 F. M. Jaeger Lect. Princ. Symmetry vii. 171 The classification of twins into such as are produced by juxtaposition or by penetration, may have certain advantages from a practical standpoint. < as lemmas |
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