单词 | murmanite |
释义 | murmaniten. Mineralogy. A triclinic hydrated silicate of sodium, titanium, and niobium, Na2(Ti,Nb)2Si2O9·nH2O, usually occurring as aggregates of lilac to bright pink, platy crystals. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > miscellaneous silicates > [noun] > silicates of zirconium and others rosenbuschite1888 hiortdahlite1892 murmanite1924 1924 Mineral. Abstr. 2 263 Various new primary occurrences were found for..a new mineral murmanite from Alluaiva, Angvunsiok, and Sengischorr. 1951 Mineral. Abstr. 11 240 Recalculation of analyses of murmanite..suggests a formula (Na2,Ca)TiSiO5·xH2O analogous to that of sphene. 1968 I. Kostov Mineral. ii. v. 298 Murmanite and lomonosovite form a complete isomorphous series and are monoclinic like sphene and fersmanite. 1988 Amer. Mineralogist 73 934/1 The presence of a superstructure has not been reported previously for murmanite. This entry has been updated (OED Third Edition, March 2003; most recently modified version published online March 2022). < n.1924 |
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