| 单词 | planchéite | 
| 释义 | planchéiten. Mineralogy.   A hydrated silicate and hydroxide of copper, Cu8Si8O22(OH)4.H2O, found in oxidized copper deposits in the form of blue, fibrous, translucent crystals of the orthorhombic system. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > miscellaneous silicates > 			[noun]		 > other silicates of one element achirite1820 planchéite1908 soddyite1922 parsettensite1924 bredigite1948 coffinite1954 1908    Chem. Abstr. 2 1675  				Plancheite..is a new hydrous copper silicate and is found at the copper mine of Mindouli [French Congo]. 1920    Brit. Mus. Return 145 in  Parl. Papers XXXVI. 673  				Copper and uranium ores from Katanga, Congo, including..plancheite, dioptase, malachite, chrysocolla, &c. 1968    Mineral. Abstr. 19 54/1  				Planchéite occurs in the iron deposit of Capo Calamita, Elba, where it was found in the form of small masses with a radial fibrous structure, associated with dioptase and chrysocolla. 1977    Amer. Mineralogist 62 491/1  				Unfortunately, for planchéite the poor quality of the asbestos-like material has allowed only a semi-quantitative structure refinement. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < | 
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