| 释义 |
tritomite Min.|ˈtrɪtəmaɪt|
[ad. G. tritomit (P. H. Weibye 1850, in Ann. d. Physik u. Chem. LXXIX. 299), f. Gr. τρίτοµος thrice-cut, in allusion to the shape of the cavities left by the crystals: see -ite1.]
a. A borosilicate, fluoride, and hydroxide of cerium earths, calcium, and thorium found as brown trigonal crystals.
b. tritomite-Y: an analogue of this in which yttrium largely replaces cerium.
1856Edin. New Philos. Jrnl. III. 60 The tritomite here analysed was sent me by M. Wiborg of Brevig, labelled as thorite, which it also very closely resembled in appearance. 1962Amer. Mineralogist XLVII. 9 Tritomite, a rare, metamict boro-silicate..is known only from the nepheline syenite pegmatites of Låven, Brevik, and Barkevik, in..southern Norway. 1966Ibid. LI. 156 The terms..spencite, [etc.]. should be dropped... Respectively, these minerals would be known as..tritomite-(Y), [etc.]... The Commission [on New Minerals and Mineral Names of the International Mineralogical Association] has approved this nomenclature. |