单词 nontronite 释义 nontronite Min.|nntrnat|[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 tend...