| 单词 |
pyroxenoid |
| 释义 |
pyroxenoid Min.|paɪˈrɒksənɔɪd|
[f. prec. + -oid.]
Any of a small group of triclinic silicates formerly classed as pyroxenes but now differentiated from them on structural grounds.
1937H. Berman in Amer. Mineralogist XXII. 389 The so-called ‘triclinic pyroxenes’ are not included here in the pyroxenes because the writer believes they are more properly considered as a separate group, with no isomorphous relations to any of the pyroxene minerals, and with physical and chemical properties clearly differing from those of the pyroxenes. To these pyroxene-like minerals we here give the name pyroxenoids. 1942Rogers & Kerr Optical Mineral. (ed. 2) ii. 275 Pyroxenoids include rhodonite, bustamite, pectolite, and wollastonite. 1966J. Sinkankas Mineral. ii. 487 The pyroxenoids are species whose chemical compositions resemble the pyroxenes, but [whose] crystal structures differ slightly but importantly in the way the chains are linked and arranged. 1977A. Hallam Planet Earth 136 Rhodonite is closely similar in structure to the pyroxene group (for this reason it is sometimes called a pyroxenoid). |
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单词 Pyrex 释义 Pyrex|parks|Also pyrex.[Invented word.Cf. the following quot.: 1957 Amer. ......