单词 | plumbocalcite |
释义 | > as lemmasplumbocalcite plumbocalcite n. Brit. /ˌplʌmbə(ʊ)ˈkalsʌɪt/ , U.S. /ˌpləmboʊˈkælˌsaɪt/ [compare French †plombocalcite (1847 or earlier; now plumbocalcite; < English)] Mineralogy (now rare) a variety of calcite with some of the calcium replaced by lead.ΚΠ 1832 J. F. W. Johnson in Edinb. Jrnl. Sci. 6 81 The lead may increase or decrease till the crystals become wholly lead or wholly lime; and I propose the name plumbo-calcite as a short way of designating all such varieties of the mineral as may contain lead in any proportion. 1855 J. D. Dana Man. Mineral. (ed. 7) 117 Plumbocalcite, from Cornwall, contains 2·34 per cent. of carbonate of lead. 1951 C. Palache et al. Dana's Syst. Mineral. (ed. 7) II. 154 Calcite... Plumbian. Plumbocalcite... Relatively highly plumbian material is white or yellowish in color, opaque, and has a pearly or silky luster. < as lemmas |
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