Y Yafsoanite (garnet: IMA1981-022) 4.CC.25 (IUPAC: tricalcium ditellurium(IV) tri(tetraoxozincate)) Yagiite (milarite: IMA1968-020) 9.CM.05 Yakhontovite (montmorillonite, smectite: IMA1984-032a) 9.EC.40 Yakovenchukite-(Y) (IMA2006-002) 9.EF.30 [no] Yakubovichite (IMA2020-094) 8.0 [no] [no] Yancowinnaite (tsumcorite: IMA2010-030) 8.0 [no] [no] (IUPAC: lead copper aluminium hydro diarsenate monohydrate) Yangite (IMA2012-052) 9.D?. [no] [no] (IUPAC: lead manganese octaoxotrisilicate monohydrate) Yangzhumingite (mica: IMA2009-017) 9.EC.20 [no] (IUPAC: dipotassium pentamagnesium icosaoxyoctasilicate tetrafluoride) Yanomamite (IMA1990-052) 8.CD.10 (IUPAC: indium arsenate dihydrate) Yarlongite (carbide: IMA2007-035) 1.BA.30 [no] (IUPAC: (tetrachromium tetrairon nickel) tetracarbide) Yaroshevskite (IMA2012-003) 8.0 [no] [no] (IUPAC: nonacopper dichloro dioxo tetravanadate) Yaroslavite (IMA1968 s.p., 1966) 3.CB.50 (IUPAC: tricalcium dihydro decafluorodialuminate monohydrate) Yarrowite (IMA1978-022) 2.CA.05d (IUPAC: nonacopper octasulfide) Yarzhemskiite (IMA2018-019) 6.0 [no] [no] (IUPAC: potassium [dihydro heptaoxo pentaborate] monohydrate) Yavapaiite (IMA1962 s.p., 1959) 7.AC.15 (IUPAC: potassium iron(III) disulfate) Yazganite (alluaudite: IMA2003-033) 8.AC.10 (IUPAC: sodium magnesium diiron(III) triarsenate monohydrate) Yeatmanite (Y: 1938) 9.AE.45 Yecoraite (tellurite-tellurium oxysalt: IMA1983-062) 7.DF.70 (IUPAC: triiron(III) pentabismuth nonaoxo trioxotellurate(IV) di(tetraoxotellurate(VI)) nonahydrate) Yedlinite (IMA1974-001) 3.DB.50 Ye'elimite (IMA1984-052) 7.BC.15 (IUPAC: tetracalcium hexaluminium dodecaoxide sulfate) Yegorovite (IMA2008-033) 9.00. [no] Yeomanite (IMA2013-024) 3.0 [no] [no] (IUPAC: dilead chloro oxohydroxide) Yftisite-(Y)ch (Y: 1971) 9.AG.25 [no] Note: discredited 1987, but crystal-structure determination was reported (Balko & Bakakin, 1975). Yimengite (magnetoplumbite: IMA1982-046) 4.CC.45 Yingjiangite (phosphuranylite: IMA1989-001) 8.EC.10 (IUPAC: dipotassium calcium heptauranyl hexahydro tetraphosphate hexahydrate) Yixunite (auricupride: IMA1995-042) 1.AG.50 (IUPAC: triplatinum indium alloy) Yoderite (IMA1962 s.p., 1959) 9.AF.25 Yofortierite (palygorskite: IMA1974-045) 9.EE.20 Yoshimuraite (seidozerite, bafertisite: IMA1967 s.p., 1961) 9.BE.42 Yoshiokaite (feldspathoid, nepheline: IMA1989-043) 9.FA.05 Yttriaite-(Y) (IMA2010-039) 4.CC. [no] [no] (IUPAC: diyttrium trioxide) Yttrialite-(Y) (IMA1987 s.p., 1889) 9.BC.05 Yttrocolumbite-(Y)Q (IMA1987 s.p., 1837) 4.DB.25 Note: possibly samarskite-(Y). Yttrocrasite-(Y)Q (columbite: IMA1987 s.p., 1906) 4.DG.05 Note: its description is poor and so it is questionable. Yttrotantalite-(Y) (IMA1987 s.p., 1802) 4.DG.10 Yttrotungstite 4.FD.20 (IUPAC: REE ditungsten trihydro hexaoxide) Yttrotungstite-(Ce) (IMA1970-008) 4.FD.20 [no] Yttrotungstite-(Y) (IMA1987 s.p., 1927) 4.FD.20 Yuanfuliite (IMA1994-001) 6.AB.20 Yuanjiangite (tin alloy: IMA1993-028) 1.AC.15 (IUPAC: gold stannide) Yugawaralite (zeolitic tectosilicate: IMA1997 s.p., 1952) 9.GB.15 Yukonite (Y: 1913) 8.DM.25 (IUPAC: dicalcium triiron(III) tetrahydro triarsenate tetrahydrate) Yuksporite (Y: 1923) 9.DG.95 Yurgensonite (IMA2019-059) 8.0 [no] [no] (IUPAC: dipotassium tin titanium dioxo diarsenate) Yurmarinite (anhydrous arsenate: IMA2013-033) 8.0 [no] [no] Yushkinite (valleriite: IMA1983-050) 2.FD.30 Yusupovite (IMA2014-022) 9.D?. [no] [no] Yuzuxiangite (ohmilite: IMA2020-084) [no] [no] Yvonite (IMA1995-012) 8.CB.25 (IUPAC: copper hydroxoarsenate(V) dihydrate) Z Żabińskiite (titanite: IMA2015-033) 9.AG.15 [no] [no] Zabuyelite (IMA1985-018) 5.AA.05 (IUPAC: dilithium carbonate) Zaccagnaite (hydrotalcite: IMA1997-019) 5.DA.45 (IUPAC: tetrazinc dialuminium dodecahydroxide carbonate trihydrate) Zaccariniite (IMA2011-086) 2.0 [no] (IUPAC: rhenium nickel arsenide) Zadovite (zadovite, arctite: IMA2013-031) 8.0 [no]