单词 | penfieldite |
释义 | penfielditen. Mineralogy. A rare mineral of the hexagonal system which consists of a basic lead chloride, Pb2Cl3OH, and typically occurs as tiny prisms, colourless when pure. ΘΚΠ the world > the earth > minerals > types of mineral > halides > [noun] > fluorite group > lead hydroxychloride fiedlerite1892 penfieldite1892 pseudoboleite1897 paralaurionite1899 1892 F. A. Genth in Amer. Jrnl. Sci. 144 260 While examining a lot of minerals, formed by the action of sea water on ancient slags which Mr. Geo. L. English collected at Laurion, Greece, I noticed a very few hexagonal crystals which proved to be a new species, for which I propose the name: Penfieldite, in honor to Prof. Sam'l L. Penfield the indefatigable worker in mineralogy and crystallography. 1954 Mineral. Abstr. 12 453 The stocks..of two Roman anchors recovered from the Mediterranean are covered with a crust of small crystals of anglesite, phosgenite, penfieldite,..and specks of metallic copper and copper stains. 2003 Mineral. Rec. 34 188 A surprising quantity of the rare mineral penfieldite as small, sharp, pyramidal crystals lining vugs in galena..was found in 2001 at the Margarita mine in Sierra Gorda. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < n.1892 |
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