röntgeniten.
/ˈrʌntjənʌɪt/, /ˈrʌntɡənʌɪt/, /ˈrəːntɡənʌɪt/, U.S. /ˈrɛntɡənaɪt/, /ˈrɛntdʒənaɪt/ Mineralogy.
A mineral containing the rare earth elements cerium and lanthanum, typically occurring as small yellow or brown crystals. Also röntgenite-(Ce).Röntgenite is a fluorocarbonate of calcium, cerium, and lanthanum, Ca2(Ce,La)3(CO3)5F3. Crystal system: trigonal.
ΘΚΠ
the world > the earth > minerals > types of mineral > carbonates > [noun] > fluocarbonates of cerium
parisite1846
fluocerine1849
bastnäsite1868
synchisite1901
röntgenite1953
1953 G. Donnay in Amer. Mineralogist 38 868 (title) Roentgenite, 3CeFCO3.2CaCO3, a new mineral from Greenland.
1993 Amer. Mineralogist 78 415 (title) The atomic arrangement of bastnäsite-(Ce), Ce(CO3)F, and structural elements of synchysite-(Ce), röntgenite-(Ce), and parisite-(Ce).
1996 P. J. Wyllie et al. in A. P. Jones et al. Rare Earth Minerals iv. 80 The common representatives are:..for group (3), bastnäsite-series REE carbonates such as synchysite, bastnäsite, parisite and roentgenite.
This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022).
<
n.1953