 | | Journal (article/letter/editorial) | | The Trimouns Quarry Luzenac, Ariège, France Freddy Marty Rue de l’Hôpital 11230-Chalabre France In recent...recent decades, the Trimouns quarry has become well known as a source of outstanding crystals of several...familiar species such as allanite, parisite and bastnäsite, as well as very rare ones such as hingganite...contact zone of the Trimouns talc/chlorite deposit, where large-scale mining for talc may now be approaching...approaching its end. INTRODUCTION The Trimouns talc-chlorite deposit is a mineral locality of international |  | | Journal (article/letter/editorial) | | Crystal System if M1 = Mg. Otherwise Allanite-(Ce) (Ca,Ce,La)2(Al,Fe2+,Fe3+)3Si3O12(OH) Monoclinic a proper...Monoclinic attached; the prefixes Allanite-(Y) (Y,Ce,Ca)2(Al,Fe3+)3Si3O12(OH) Monoclinic ferro and mangano...respecDissakisite-(Ce) Ca(Ce,La)MgAl2(SiO4)3(OH) Monoclinic Dissakisite-(La) Ca(La,Ce)MgAl2(SiO4)3(OH)...Ce)MgAl2(SiO4)3(OH) Monoclinic tively. The dominant Dollaseite-(Ce) CaCeMg2AlSi3O11(F,OH)2 Monoclinic cation on A2 (other...desigFerriallanite-(Ce) CaCeFe3+AlFe3+Si3O12(OH) Monoclinic nation. Table 2 shows Khristovite-(Ce) (Ca,REE)REE(Mg |  | | Journal (article/letter/editorial) | | Mössbauer spectroscopy. Cerite-(Ce) is, together with ferriallanite-(Ce), the most important REE mineral...occurrences worldwide, the present samples of cerite-(Ce) are poor in Ca and enriched in Mg and F. Calcium...apfu, and is mainly in the trivalent state. Cerite-(Ce) is a major carrier of Y (up to 3.5 wt.% Y2O3). Fluorbritholite...in REE and Y occur, ranging from fluorbritholite-(Ce) to the unaccredited member “fluorbritholite-(Y)”...with Ca < 2 and (REE + Y) > 3 apfu. Västmanlandite-(Ce) is another important host for the REE in subtype |  | | Journal (issue) | | net SEPTEMBER–OCTOBER 2023 Articles The Dry Gill Mine, Caldbeck, Allerdale, Cumbria, England............containing a wet and dry cave environment and a mine. He was active in the Tucson Gem and Mineral Society...TRINCHILLO TOURMALINE WITH LEPIDOLITE Cruzeiro Mine, Brazil 16 cm | w w w.FineMineral.com Fine... /crystal.classics.fine.minerals The Dry Gill Mine Caldbeck, Allerdale, Cumbria, England Peter S. Burr...to green, barrel-shaped crystals at the Dry Gill mine in Cumbria, England. It is among the most attractive |  | | Report (volume) | | after its locality Andros Island/Greece; dissakisite(Ce) (Grew et al. 1991), named from Greek dissakis twice...Mg analogue has been described twice; dollaseite-(Ce) (Peacor and Dunn 1988), named after W. A. Dollase...definitive research on the epidote minerals; khristovite-(Ce) (Pautov et al. 1993), named after the Russian geologist...ilvaite A M1M2M3 [O/(OH)2/ Si2O7] gatelite-(Ce) A1A(2,3,4) M1M2a,bM3 [O/(OH)2/ (SiO4)3/Si2O7]...structure. In the newly described mineral gatelite-(Ce) (Bonazzi et al. 2003), modules of the epidote-type |  | | Book | | O–H-stretching vibrations of some magnesium serpentines and talc. One cannot exclude that this band corresponds to...smectites, members of the kaolinite-serpentine group, talc, vermiculite, mixed-layer minerals) are important...groups (n = 0, 1, or 2). Based on the analogy with talc, it was supposed (Wilkins 1967) that the replacement...Dickite 3704, 3654, 3622 Nacrite 3703, 3647, 3629 Talc 3676, 3660w Pyrophyllite 3675, 3647w Muscovite...phenomenon was explained by the presence of the talc component Mg3(Si4O10)(OH)2. IR spectra of synthetic |
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Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France