New Data on Chemical Composition and Vibrational Spectra of Magnetoplumbite-Group Minerals

Ardennite-bearing mineral association related to sulfide-free ores with chalcophile metals at Nežilovo, Pelagonian Massif, North Macedonia

“…In addition to carbonate and ardennite, a number of accessory minerals also occur in the rock: nežilovite (which can occur in significant quantities), colorless to white Zn-rich amphibole, chlorite, piemontite, hematite and dioctahedral mica (colorless, pink, red and honey-brown). Zn-rich amphiboles, including the white amphibole from a similar association, is described as the most Zn-rich amphibole described so far (Chukanov et al, 2020a). Ardennite is closely related to red and honey-brown mica with which it sometimes forms oriented growth, and it can be very difficult to spot and separate them.…”

“…A large number of scientific papers have been published on the curious mineralogy of Nežilovo, including descriptions of five new mineral species, piemontite-(Pb) (CaPb)(Al 2 Mn 3+ )(Si 2 O 7 )(SiO 4 )O(OH) (Bermanec et al, 1994;Chukanov et al, 2012), nežilovite PbZn 2 Mn 4+ 2 Fe 3+ 8 O 19 (Bermanec et al, 1996), zincohögbomite-2N6S (Zn,Al) 7 (Al,Fe 3+ ,Ti,Mg) 16 O 31 (OH) (Armbruster et al, 1998), ferricoronadite Pb(Mn 4+ 6 Fe 3+ 2 )O 16 (Chukanov et al, 2016) and zincovelesite-6N6S Zn 3 (Fe 3+ ,Mn 3+ ,Al,Ti) 8 O 15 (OH) (Chukanov et al, 2018b), as well as data on isomorphism, parageneses and possible mechanisms of formation of numerous rare minerals, including several tens of potentially new mineral species belonging to the epidote, högbomite and pyrochlore supergroups and magnetoplumbite, crichtonite and ilmenite groups (Barić, 1960;Barić and Ivanov, 1960;Jančev, 1975Jančev, , 1998Ivanov and Jančev, 1976;Holtstam and Langhof, 1999;Jančev and Chukanov, 2008;Chukanov et al, 2015Chukanov et al, , 2018aChukanov et al, , b, 2019Chukanov et al, , 2020aJančev et al, 2016;Ermolaeva et al, 2016Ermolaeva et al, , 2017Ermolaeva et al, , 2019aVarlamov et al, 2018).…”

Nomenclature of the magnetoplumbite group

“…Furthermore, Chukanov et al . (2019) recently published analyses of a Ba-dominant analogue to nežilovite and of an Al analogue to yimengite.…”

“…A Mn 3+ -analogue to plumboferrite was detected by Chukanov et al (2016). Furthermore, Chukanov et al (2019) recently published analyses of a Ba-dominant analogue to nežilovite and of an Al analogue to yimengite. From a vast amount of studies of synthetic compounds, it can be speculated that many new natural members exist with, for example: A = Sr 2+ , REE (Ce 3+ , La 3+ etc.…”