| 单词 |
nontronite |
| 释义 |
nontronite Min.|ˈnɒntrənaɪt|
[ad. F. nontronite (Berthier 1827), f. Nontron (in France), its locality.]
A pale-yellow variety of chloropal. Now the usual name for the mineral.
1832Shepard Min. 246 Nontronite...Soft; opake: unctuous and tender. 1837Dana Syst. Min. 224. 1928 Amer. Jrnl. Sci. CCXV. 10 A large number of names have been proposed for the hydrous silicates of ferric iron; and of these nontronite, chloropal, pinguite, fettbol, and graminite are recognized by most mineralogists as belonging to the species nontronite. 1935, etc. [see montmorillonite]. 1945Prof. Papers U.S. Geol. Survey Paper No. 205-B. 28/1 The name chloropal has a slight priority over nontronite. However, the material has been shown to be definitely crystalline by both optical and X-ray methods, and the name chloropal, suggesting a deeply colored opaline mineral, is unsuitable. Dana (1892, p. xliii) has laid down the rule that a name having priority may properly be set aside when its signification is glaringly false. Mineralogists for some time have used the name nontronite as the most suitable for this mineral. 1963M. H. Hey Index Min. Species (ed. 2) App. 117 Nontronite... The older name Chloropal has passed out of common use. |
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