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). < n.1908 |
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