| 单词 | crystal system |
| 释义 | > as lemmascrystal system crystal system n. Crystallography = system n. 7. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > crystal systems > [noun] system1815 crystal system1847 1847 J. Müller Princ. Physics & Meteorol. viii. iii. 544 All their forms are essentially referrible to a regular hexagonal star, from whence it follows that snow-flakes belong to the hexagonal system of crystals (the crystal-system of rock crystals). 1914 Proc. Royal Soc. A. 90 14 It is..extremely difficult to say to which of two crystal systems it really belongs. 1971 I. G. Gass et al. Understanding Earth i. 19/1 Recognition of the crystal system is of course a very considerable aid to identification of a mineral. 2000 W. D. Nesse Introd. Mineral. vii. 121/1 Materials of geological interest that are optically isotropic include volcanic glass and minerals that crystallize in the isometric crystal system. < as lemmas |
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