单词 | geocronite |
释义 | geocroniten. Mineralogy. A grey to grey-blue mineral consisting of a sulphide of lead, antimony, and arsenic and typically occurring as massive or granular deposits in hydrothermal veins.Chemical formula: Pb14Sb5AsS23. Crystal system: orthorhombic. ΘΚΠ the world > the earth > minerals > types of mineral > sulphides and related minerals > sulpho-salts > [noun] > lead antimony sulphide plagionite1835 zinckenite1835 kilbrickenite1841 geocronite1842 plumbostib1844 schulzite1849 boulangerite1868 jordanite1868 robinsonite1951 1842 Edinb. New Philos. Jrnl. 33 204 Geokronite.—This new mineral species occurs in the mine of Sala in Sweden. 1875 H. B. Cornwall et al. tr. Plattner's Man. Anal. Blowpipe (rev. ed.) 266 Occasionally part of the Sb‴ is replaced by As‴, as in geocronite. 1909 Prof. Papers U.S. Geol. Surv. No. 66. 117 The minerals geocronite (5PbS.Sb2S3) and stephanite (5Ag2S.Sb2S3) have analogous formulas. 1972 Chem. Abstr. 77 abstr. no. 123684 A study of the compn. of minerals formed under the action of Thiobacillus ferrooxidans on boulangerite..and geokronite. 1999 I. Kostov & R. I. Kostov Crystal Habits Minerals vi. 104 If two semi-metals occur together in the composition of a sulphosalt, they tend to be in stoichiometric quantities (e.g. geocronite Pb5SbAsS8). This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022). < n.1842 |
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