This is a 'preproof' accepted article for Mineralogical Magazine. This version may be subject to change during the production process. DOI: 10.1180/mgm.2022.7 Hellandite-(Y)–hingganite-(Y)–fluorapatite retrograde coronae: a novel type of fluid- induced dissolution-reprecipitation breakdown of xenotime-(Y) in the metagranites of Fabova Hoľa (Western Carpathians, Slovakia) Martin Ondrejka 1* , Alexandra Molnárová 1 , Marián Putiš 1 , Peter Bačík 1 , Pavel Uher 1 , Bronislava Voleková 2 , Stanislava Milovská 3 , Tomáš Mikuš 3 , Libor Pukančík 4 1 Department of Mineralogy Petrology and Economic Geology, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, Mlynská dolina, 842 15, Bratislava, Slovakia, *corresponding author: martin.ondrejka@uniba.sk 2 Slovak National Museum, Natural History Museum, Vajanského nábrežie 2, P.O. BOX 13, 810 06 Bratislava, Slovakia 3 Earth Science Institute of the Slovak Academy of Sciences, Ďumbierska 1, 974 01, Banská Bystrica, Slovakia 4 HBP (Inc.), Mining Facility Čáry, Matice slovenskej 10, 971 01 Prievidza, Slovakia Abstract Two contrasting reaction coronae were developed around REE accessory phosphates in Variscan meta-granitic rocks, which had been overprinted by Alpine blastomylonitisation