...Uwe Kolitsch; Stuart J. Mills; Ritsuro Miyawaki; Günter Blass Abstract The new mineral ferriallanite-(La) (IMA 2010-066), ideally CaLaFe 3+ AlFe 2+ (SiO 4 )(Si 2 O 7 )O(OH), is a member of the epidote supergroup and the La analogue of ferriallanite-(Ce). It occurs as a single, thick, tabular {100...

...Mariko Nagashima; Teruyoshi Imaoka; Kazuo Nakashima Abstract The crystal chemistry of Ti-rich ferriallanite-(Ce) in syenites from Cape Ashizuri, Shikoku Island, Japan, was studied using electron microprobe analysis (EMPA) and single-crystal X-ray diffraction methods. Our specimens (AS001 and AS304...

.... They predominantly consist of clinopyroxene, garnet, vesuvianite, plagioclase, wollastonite, esseneite (or olivine), calcite and dolomite, with accessory ferriallanite-(Ce), phlogopite, amphibole, quartz, apatite, spinel, cerite-(Ce) and monazite. TABLE 5. REPRESENTATIVE CHEMICAL COMPOSITIONS OF VESUVIANITE...

..., wollastonite, esseneite, olivine, calcite and dolomite, with accessory ferriallanite-(Ce), phlogopite, amphibole, quartz, apatite, spinel, cerite-(Ce) and monazite. We report the whole-rock geochemistry and electron-microprobe data for related Th-, U- and LREE-bearing garnet, ferriallanite-(Ce) and cerite-(Ce...

...Dan Holtstam; Ulf B. Andersson; Joakim Mansfeld Abstract Ferriallanite-(Ce), previously reported as “cerine” or iron-rich “allanite”, is the most common lanthanide mineral next to cerite-(Ce) at the Bastnäs Fe–Cu–REE deposit, Skinnskatteberg, Västmanland, Sweden. It is closely associated...

...Pavel M. Kartashov; Giovanni Ferraris; Gabriella Ivaldi; Elena Sokolova; Catherine A. McCammon Abstract Ferriallanite-(Ce), ideally CaCeFe 3+ AlFe 2+ (SiO 4 )(Si 2 O 7 )O(OH), is the analogue of allanite-(Ce) with Fe 3+ dominant in the octahedral site M (1). It is of metasomatic origin and occurs...

...) and ferriallanite-(Ce) formed locally, partly resulting from the breakdown of primary monazite-(Ce). Alteration of allanite-(Ce) or ferriallanite-(Ce) to bastnäsite-(Ce) and minor synchysite-(Ce) at lower temperatures represents the latest stage of REE mineral formation. The para-genetic sequence and mineral...

...Fig. 9 Backscattered electron images showing hydrothermal textures involving REE-, Zr-, and Ti-bearing minerals in the granite (A, B), pegmatite (C), and quartz/fluorite veins (D-F). A) Interstitial secondary zircon spherules, gittinsite, ferriallanite-(Ce), and quartz replacing primary K...

... is not present in either ferriallanite-(Ce) or epidote, in which M 3 is almost fully occupied either by Fe 2+ or by Fe 3+ . Comparisons of bond lengths and volumes in cation polyhedra among allanite-(Ce), ferriallanite-(Ce) and epidote tend to indicate that the essential factor that facilitates site splitting...

...), ideally La 2 Si 2 O 7 , was found in polymineralic nodules of the Mochalin Log REE deposit, Chelyabinsk Oblast, South Urals, Russia. It is associated with allanite-(Ce), allanite-(La), bastnäsite-(Ce), bastnäsite-(La), ferriallanite-(Ce), ferriallanite-(La), ferriperbøeite-(Ce), ferriperbøeite-(La...

...), bastnäsite-(Ce), bastnäsite-(La), ferriallanite-(Ce), ferriallanite-(La), ferriperbøeite-(La), fluorbritholite-(Ce), törnebohmite-(Ce) and törnebohmite-(La). Radekškodaite-(Ce) is associated with ancylite-(Ce), bastnäsite-(Ce), bastnäsite-(La), lanthanite-(La), perbøeite-(Ce) and törnebohmite-(Ce). The new...

... and perbøeite-(La) (CaLa 3 )(Al 3 Fe 2+ )[Si 2 O 7 ][SiO 4 ] 3 O(OH) 2 . Both minerals occur in polymineralic nodules and are associated with one another and allanite-(Ce), allanite-(La), bastnäsite-(Ce), bastnäsite-(La), ferriallanite-(Ce), ferriallanite-(La), ferriperbøeite-(Ce), perbøeite-(Ce), törnebohmite...

...). The mineral occurs in direct contact with ferriallanite-(Ce), cerite-(Ce) and törnebohmite-(Ce). In the type specimen, ferriperbøeite-(Ce) forms brownish black crystals, and exhibits an irregular to short-prismatic morphology elongated along [0 1 0]. The maximum crystal size is about 500 µm. The mineral...

... with ferriallanite-(Ce), the most important REE mineral at Bastnäs, but less common at the subtype-2 deposits. Compared to other occurrences worldwide, the present samples of cerite-(Ce) are poor in Ca and enriched in Mg and F. Calcium and (REE + Y) in the samples are negatively correlated, and the upper limit...