variety, 09.FA.35 Ilmenorutile, a rutile variety, 04.DB.05 Incaite*, a franckeite variety, 02.HF.25b Kamacite, a native iron variety, 01.AE.05 Kerolite* (discredited 1979), a Ni-bearing variety of talc (?), 09.EC.05, [no] Lewistonite* (discredited 1978), a carbonate-rich variety of fluorapatite, 08.BN.05 [no] Metaberyllite* (Y: 1973, discredited 2006), a variety of beryllite, 09.AE.05, [no] Potosiite*, a franckeite variety, 02.HF.25b Sakharovaite* (Y: 1956, discredited 2006), a Bi-bearing variety of jamesonite, 02.HB.15, Struverite*, a rutile variety, 04.DB.05 Doubtful procedures Unnamed minerals, controversial discreditations Wolframoixiolite, a W-bearing variety of ixiolite, 04.DB.25; possibly a separate species. Scandian ixiolite (of von Knorring)N, a Nb-bearing variety of ixiolite, 04.DB.25; possibly a separate species. Scandian ixiolite (of Bergstol)N, a Sc-bearing variety of ixiolite, 04.DB.25; possibly a separate species. Ktenasite (Y: 1950) 07.DD.20, possibly a mineral group, under review (Leverett et al., 2009–2011). Unnamed (Zn-analogue of Ktenasite)N. Unnamed (Co-analogue of Ktenasite)N. Mg- or Cd-bearing varieties are also known. Loparite-(Ce) (Y: 1923) 04.CC.35, possibly a mineral group Mitchell R H, Burns P C, Chakhmouradian A R (2000) The crystal structures of loparite-(Ce), The Canadian Mineralogist 38, 145-152. Zubkova, N. V., Arakcheeva, A. V., Pushcharovskii, D. Y., Semenov, E. I., & Atencio, D. (2000). Crystal structure of loparite. Crystallography Reports, 45(2), 210-214. Calciogadolinite-Y? (Y: 1938) might be a calcian gadolinite. ClinotyroliteN (monoclinic), both minerals might belong to a mineral group since tyrolite was shown to be monoclinic (pseudo-orthorhombic). Yttromicrolite-(Y) within the framework of nomenclature of Hogarth (1977): discreditation was not made by proper way (in the course of defamation of Crook, 1982). Pimelite* (Y: 1800, 1938) a nickel dominant smectite, is under review. Associations: nickel-bearing talc, yellow green nickeloan nontronite, red brown hematite stained nontronite, bright white montmorillonite. Tetranatrolite (discredited in 1999): might be identical to gonnardite, discreditation procedure apparently done without actually working on the type specimen or on any identified tetranatrolite itself. Yftisite-(Y) (discredited in 1987): but apparently the cell parameters are known (Balko & Bakakin, 1975). Buserite (IMA1970-024): dehydrates to birnessite, known synthetic compound. Zincobotryogen: it is discredited (IMA1967 s.p.) but its crystal structure has been solved (space group 14). Strontioborite: it is discredited (IMA1962 s.p.) but its crystal structure has been solved (space group 4). Aguilarite (Y: 1944, Ag4SeS, 2.BA.55): it might be two solid solution series, a monoclinic ‘acanthite-like’ series (from Ag2S - Ag2S0.4Se0.6), and an orthorhombic ‘naumannite-like’ series (from Ag2S0.3Se0.7 - Ag2Se). Controversial chemical formulas (IMA Master List) (and/or possible "analytical" artifacts) Kobeite-Y (Y: 1950) 04.DG.05, the original