英语词汇“diplohedron”的英英意思、用法、释义、翻译、读音、例句、短语、词组、英语词典-本地帮

单词

diplohedron

释义

diplohedron Cryst.|dɪpləʊˈhiːdrən|
[f. diplo- + Gr. ἕδρα seat, base: cf. trihedron.]
A crystalline form contained by twenty-four trapezoidal planes with two sides equal; a dyakis-dodecahedron.
1878Lawrence Cotta's Rocks Class. 211 The large diplohedrons of quartz are very much rounded off.1895Story-Maskelyne Crystallogr. 216 The terms dyakis-dodecahedron and diplohedron have been employed to convey the idea of the form [twenty-four-trapezohedron] being a doubled or broken-faced pentagon-dodecahedron.Ibid. 217 Other diplohedra are met with on crystals of pyrites, and occur also on those of hauerite and cobaltine.
Hence diploˈhedral a., of the nature of a diplohedron.
1878Gurney Crystallogr. 54 A diplohedral form is one in which each normal bears two parallel faces, one at each end.1895Story-Maskelyne Crystallogr. 207 Hemisystematic diplohedral forms; hemi-tesseral diplohedra.

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