Kristiansenite, thortveitite and ScNbO4: Products ofCa-metasomatism of Sc-enriched columbite-(Mn) from NYFpegmatite Kožichovice II, Czech Republic

Granitic pegmatites, particularly those of NYF affinity (Cerný & Ercit, 2005), were recognized as important geological environment rich in Sc-minerals, along with their rare occurrence in LCTpegmatite (Výravský et al., 2017). However, only two terrestrial localities/regions are known to show high diversity of Sc-minerals: 1) Heftetjern, southern Norway (Bergstol & Juve, 1988; Raade et al., 2002, 2004; Kolitsch et al., 2010) and Baveno area in northern Italy (Gramaccioli et al., 2000; Pezzotta et al., 2005; Guastoni et al., 2012). We report a unique assemblage of Sc-rich minerals from intragranitic NYF pegmatite Kožichovice II, Třebic pluton, Czech Republic (Novak & Filip, 2010) and discuss their chemical composition and origin.