0 m depth) were examined briefly for mineralogy and mode of occurrence and concludes that the sample consist of dispersed clusters of fine-grained synchysite
Rare earth carbonate minerals synchysite
and bastnasite have been observed in samples of fresh, unweathered carbonatite beneath this weathered profile.
Mineralogical work completed by the company indicated that a wide variety of rare-earth element-bearing minerals have been identified, including apatite, iimoriite, kainosite, gadolinite, allanite, bastnaesite, parisite, brannerite, thalenite, xenotime, fergusonite, synchysite
(Y), and monazite.
OH-dominant analogs of synchysite, parisite and rontgenite are not known for certain in nature, whereas OH>F in all ancylite-group minerals; fluorine is a minor admixture, but not an essential constituent in them (Pekov et al.
In these minerals, the Ba and REE cations are ordered, like Ca and REE in parisite, synchysite and rontgenite, whereas Sr,REE carbonates with bastnasite-like structures are unknown.
1953) The crystallography of bastnaesite, parisite, roentgenite and synchysite
A number of good specimens of bicolored elbaite and schorl were recovered, along with a number of other rare and interesting minerals including clinobisvanite, stibiotantalite, danburite, hambergite, pyrochlore, and synchysite
(DeVito and Ordway, 1984).
was reported together with anatase from Christiansstoll by Saebo and Neumann (1961).