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MINERAL CLASSIFICATION / SYSTEMATIK der MINERALE

           based on E.H. Nickel & M.C. Nichols (2009), H. Strunz & E.H. Nickel (2001),
           revised by Thomas Witzke (2022)



9. SILICATES
(Silicates, Germanates)


9.B: Sorosilicates


9.BA. Sorosilicates, Si2O2 groups, without aditional anions; cations in tetrahedral [4] coordination
 
9.BA.05. (no examples known at time)
 



 
 
9.BB. Sorosilicates, Si2O7 groups, without aditional anions; cations in tetrahedral [4] and greater coordination
 
9.BB.05. Melilite group
 
Gugiaite Ca2Be(Si2O7) IMA 1983-072
Hydroxylgugiaite (Ca,)2(Si,Be)(Be,Si)2O5(OH)2 tetr. IMA 2016-009
Jeffreyite (Ca,Na)2(Be,Al)(Si2(O,OH)7) IMA 1982-095
Okayamalite Ca2B(BSiO7) IMA 1997-002
Åkermanite Ca2Mg(Si2O7) G
Alumoåkermanite (Ca,Na)2(Al,Mg,Fe)(Si2O7) IMA 2008-049
Gehlenite Ca2Al(AlSiO7) G
Hardystonite Ca2Zn(Si2O7) G
Bennesherite Ba2Fe2+(Si2O7) tetr., P421m IMA 2019-068


 
9.BB.10. Barylite
 
Barylite BaBe2(Si2O7) Rd


 
9.BB.15. Andrémeyerite
 
Andrémeyerite BaFe2+2(Si2O7) IMA 1972-005, Rn


 
9.BB.20. Scottyite
 
Scottyite BaCu2+2(Si2O7) orth., Pnma IMA 2012-027



 
 
9.BC. Sorosilicates, Si2O7 groups, without aditional anions; cations in octahedral [6] and greater coordination
 
9.BC.05. Thortveitite group
 
Thortveitite Sc2(Si2O7) mon., C2/m FOTO G
Keiviite-(Y) Y2(Si2O7) mon., C2/m IMA 1984-054
Keiviite-(Yb) Yb2(Si2O7) mon., C2/m IMA 1982-065
Yttrialite-(Y) Y2(Si2O7) mon., P21/m A
Gittinsite CaZr(Si2O7) mon., Cc IMA 1979-034


 
9.BC.10. Percleveite group
 
Percleveite-(La) La2(Si2O7) tetr., P41 IMA 2019-037
Percleveite-(Ce) Ce2(Si2O7) tetr., P41 IMA 2002-023


 
9.BC.15. Keldyshite group
 
Keldyshite Na2Zr(Si2O7) IMA 1975-034
Khibinskite K2Zr(Si2O7) IMA 1973-014
Parakeldyshite Na2Zr(Si2O7) IMA 1975-035


 
9.BC.20. Rankinite
 
Rankinite Ca3(Si2O7) G


 
9.BC.25. Kristiansenite group
 
Kristiansenite Ca2ScSn(Si2O7)(Si2O6OH) IMA 2000-051
Silesiaite Ca2Fe3+Sn(Si2O7)(Si2O6OH) tric., C1 IMA 2017-064
Kosłowskiite Ca4Fe2+Sn3(Si2O7)2(Si2O6OH)2 tric., C1 IMA 2021-081


 
9.BC.30. Barysilite
 
Barysilite Pb8Mn2+(Si2O7)3 G


 
9.BC.35. Edgarbaileyite
 
Edgarbaileyite Hg1+6(Si2O7) IMA 1988-028



 
 
9.BD. Sorosilicates, Si2O7 groups, with aditional anions; cations in tetrahedral [4] and greater coordination
 
9.BD.05. Bertrandite
 
Bertrandite Be4(Si2O7)(OH)2 FOTO G


 
9.BD.10. Hemimorphite
 
Hemimorphite Zn4(Si2O7)(OH)2·H2O A


 
9.BD.15. Junitoite
 
Junitoite CaZn2(Si2O7)·H2O IMA 1975-042


 
9.BD.20. Khurayyimite
 
Khurayyimite Ca7Zn4(Si2O7)2(OH)10·4H2O mon., P21/c IMA 2018-140


 
9.BD.25. Axinite group
 
Axinite-(Mg) Ca4Mg2Al4[B2Si8O30](OH)2 IMA 1975-025, Rn
Axinite-(Mn) Ca4Mn2Al4[B2Si8O30](OH)2 Rn
Axinite-(Fe) Ca4Fe2Al4[B2Si8O30](OH)2 Rn
Tinzenite Ca2Mn4Al4[B2Si8O30](OH)2 Rd


 
9.BD.30. Boralsilite
 
Boralsilite Al16B6O30(Si2O7) IMA 1996-029


 
9.BD.35. Vránaite
 
Vránaite Al16B4Si4O38 mon. IMA 2015-084


 
9.BD.40. Werdingite
 
Werdingite Mg2Al14Si4B4O37 IMA 1988-023



 
 
9.BE. Sorosilicates, Si2O7 groups, with aditional anions; cations in octahedral [6] and greater coordination
 
9.BE.02. Wadsleyite
 
Wadsleyite Mg2SiO4 IMA 1982-012
Asimowite Fe2SiO4 orth., Imma IMA 2018-102

Wadsleyite, polymorphous with Forsterite, Ringwoodite and Poirierite, contains Si2O7-groups. The structural formula can be written as Mg4O(Si2O7).


 
9.BE.05. Lawsonite group
 
Lawsonite CaAl2(Si2O7)(OH)2·H2O G
Cortesognoite CaV3+2(Si2O7)(OH)2·H2O orth. IMA 2014-029
Itoigawaite SrAl2(Si2O7)(OH)2·H2O IMA 1998-034
Hennomartinite SrMn3+2(Si2O7)(OH)2·H2O IMA 1992-033
Noelbensonite BaMn3+2(Si2O7)(OH)2·H2O IMA 1994-058, Rd
Bartelkeite PbFe2+Ge6+(Ge4+2O7)(OH)2·H2O mon. IMA 1970-029


 
9.BE.07. Ilvaite group
 
Amamoorite CaMn2+Mn3+Mn2+(Si2O7)O(OH) mon., P21/a IMA 2018-105
Manganilvaite CaFe2+Fe3+Mn2+(Si2O7)O(OH) IMA 2002-016
Ilvaite CaFe2+Fe3+Fe2+(Si2O7)O(OH) G


 
9.BE.10. Suolunite
 
Suolunite Ca2Si2O5(OH)2·H2O A


 
9.BE.12. Aklimaite
 
Aklimaite Ca4[Si2O5(OH)2](OH)4·5H2O mon., C2/m IMA 2011-050


 
9.BE.15. Jaffeite
 
Jaffeite Ca6Si2O7(OH)6 IMA 1987-056


 
9.BE.17. Killalaite
 
Killalaite Ca6.4[H0.6Si2O7]2(OH)2 IMA 1973-033


 
9.BE.20. Fresnoite
 
Fresnoite Ba2TiO(Si2O7) IMA 1964-012


 
9.BE.22. Wöhlerite group
 
Cuspidine Ca8(Si2O7)2F4 mon., P21/a G
Låvenite Na2Ca2Mn2+2Zr2(Si2O7)2O2F2 mon., P21/a G
Normandite Na2Ca2Mn2+2Ti2(Si2O7)2O2F2 mon., P21/a IMA 1990-021
Madeiraite Na2Ca2Fe2+2Ti2(Si2O7)2O2F2 mon., P21/a IMA 2021-077
Niocalite Ca7Nb(Si2O7)2O3F mon., Pa G
Janhaugite Na3Mn2+3Ti2(Si2O7)2(OH)2OF mon., P21/n IMA 1981-018
Wöhlerite Na2Ca4ZrNb(Si2O7)2O3F mon., P21 G
Burpalite Na4Ca2Zr2(Si2O7)2F4 mon., P21/a IMA 1988-036
Baghdadite Ca6Zr2(Si2O7)2O4 mon., P21/a IMA 1982-075
Hiortdahlite Na2Ca4(Ca0.5Zr0.5)Zr(Si2O7)2OF3 tric., P-1 A
Moxuanxueite NaCa6Zr(Si2O7)2OF3 tric., P-1 IMA 2019-100


 
9.BE.25. Chirvinskyite
 
Chirvinskyite (Na,Ca)13(Fe,Mn,)2(Ti,Zr)2(Si2O7)4(OH,O)12·2H2O tric. IMA 2016-051


 
9.BE.27. Rinkite group [Seidozerite supergroup]
 
Rinkite-(Y) (Ca3Y)Na(NaCa)Ti(Si2O7)2(OF)F2 IMA 2017-043
Rinkite-(Ce) (Ca3Ce)Na(NaCa)Ti(Si2O7)2(OF)F2 FOTO IMA 1987-040, Rd
Nacareniobsite-(Ce) (Ca3REE)Na3Nb(Si2O7)2(OF)F2 IMA 1987-040, Rd
Roumaite (Ca,REE)4(Ca,Na,)3(Nb,Ti)(Si2O7)2(OH)F3 mon. IMA 2008-024
Mosandrite-(Ce) (Ca3REE)[(H2O)2Ca0.50.5]Ti(Si2O7)2(OH)2(H2O)2 Rd
Seidozerite Na2Zr2Na2MnTi(Si2O7)2O2F2 Rd
Grenmarite Na2Zr2Na2MnZr(Si2O7)2O2F2 IMA 2003-024, Rd
Götzenite Ca4NaCa2Ti(Si2O7)2(OF)F2 Rd
Hainite-(Y) (Ca3Y)Na(NaCa)Ti(Si2O7)2(OF)F2 Rd
Fogoite-(Y) Ca2Y2Na3Ti(Si2O7)2(OF)F2 IMA 2014-098, Rd
Bortolanite Ca2(Ca1.5Zr0.5)Na(NaCa)Ti(Si2O7)2(OF)F2 tric., P-1 IMA 2021-040a
Batievaite-(Y) Ca2Y2[(H2O)2]Ti(Si2O7)2(OH)2(H2O)2 IMA 2015-016, Rd
Kochite Ca2MnZrNa3Ti(Si2O7)2(OF)F2 IMA 2002-012, Rd
Rosenbuschite Ca6Zr2Na6ZrTi(Si2O7)4(OF)2F4 Rd

Rinkite group of the Seidozerite supergroup: general formula AP2MH2MO4(Si2O7)2(XMO)2(XAO)2. 1 Ti (+Nb, Zr) per formula unit, in the octahedral layer.
AP = cations at peripheral P sites, MH = cations of the heteropolyhedral sheets, MO = cations of the octahedral sheets.
Reference for the seidozerite supergroup: Sokolova, E. & Cámara, F. (2017) Mineralogical Magazine 81, 1457-1484


 
9.BE.30. Bafertisite group [Seidozerite supergroup]
 
     30 a. general formula APBPMO4MH2(Si2O7)2(XMO)2(XAO)2(XMP)
Jinshajiangite BaNaFe2+4Ti2(Si2O7)2O2(OH)2F IMA 1981-061, Rd
Perraultite BaNaMn2+4Ti2(Si2O7)2O2(OH)2F IMA 1984-033, Rd
Surkhobite KBa3Ca2Na2Mn16Ti8(Si2O7)8O8(OH)4(F,O,OH)8 IMA 2002-037, Rd
Bobshannonite KBaNa2(Mn,Na)8(Nb,Ti)4(Si2O7)4O4(OH)4(O,F)2 IMA 2014-052, Rd
 
     30 b. general formula AP2MO4MH2(Si2O7)2(XMO)2(XAO)2(XMP)2
Bafertisite Ba2Fe2+4Ti2(Si2O7)2O2(OH)2F2 Rd
Hejtmanite Ba2Mn2+4Ti2(Si2O7)2O2(OH)2F2 FOTO IMA 1989-038, Rd
 
     30 c. general formula AP2BP2MO4MH2(Si2O7)2(TO4)2(XMO)2(XAO)2
Yoshimuraite Ba4Mn2+4Ti2(Si2O7)2(PO4)2O2(OH)2 Rd
 
     30 d. general formula AP2BP2AI2mMO4MH2(Si2O7)2(CO3)m(XMO)2(XAO)2(XMP)2Fm, m = 2
Bussenite Ba4(Na)2(Fe2+Na)2Ti2(Si2O7)2(CO3)2O2(OH)2(H2O)2F2 IMA 2000-035, Rd
 
     30 e. general formula AP3BPMO8MH4(Si2O7)4(XMO)4(XAO)4(XMP)3
Cámaraite Ba3NaFe2+8Ti4(Si2O7)4O4(OH)4F3 IMA 2009-011, Rd
 

Bafertisite group of the Seidozerite supergroup: 2 Ti (+ Nb) per formula unit, in the H (heteropolyhedral) sheets.


 
9.BE.32. Lamprophyllite group [Seidozerite supergroup]
 
     32 a. general formula AP2MH2MO4(Si2O7)2(XMO)2(XAO)2
Lamprophyllite (SrNa)Ti2Na3Ti(Si2O7)2O2(OH)2 Rd
Fluorlamprophyllite (SrNa)Ti2Na3Ti(Si2O7)2O2F2 IMA 2013-102, Rd
Nabalamprophyllite (BaNa)Ti2Na3Ti(Si2O7)2O2(OH)2 IMA 2001-060, Rd
Barytolamprophyllite (BaK)Ti2Na3Ti(Si2O7)2O2(OH)2 Rd
Fluorbarytolamprophyllite (Ba,Sr,K)2(Na,Fe)3TiTi2(Si2O7)2O2F2 IMA 2016-089
Lileyite Ba2Ti2Na2Fe2+Mg(Si2O7)2O2F2 IMA 2011-021, Rd
Emmerichite Ba2Ti2Na3Fe3+(Si2O7)2O2F2 IMA 2013-064, Rd
 
     32 b. general formula AP2BP2MH2MO4(Si2O7)2(TO4)2(XMO)2(XAO)2
Innelite Ba4Ti2Na(NaCa)Ti(Si2O7)2[(SO4)(PO4)]O2O(OH) Rd
 
     32 c. general formula AP2MH2MO4(Si2O7)2(XMO)2(XAO)2(XM,AP)4
Epistolite (Na)Nb2Na3Ti(Si2O7)2O2(OH)2)(H2O)4 Rd
Zvyaginite (Na)Nb2NaZnTi(Si2O7)2O2(OH)2)(H2O)4 IMA 2013-071, Rd
Shkatulkalite Na2(Nb1-xTix)2Na3(Ti1-yMny)(Si2O7)2O2(OH)2)(H2O)n mon., P2/m IMA 1993-058
 
     32 d. general formula AI3mAP2MH2MO4(Si2O7)2(PO4)m(XMO)2(XAO)2, m = 2
Vuonnemite Na6Na2Nb2Na3Ti(Si2O7)2(PO4)2O2(OF) IMA 1973-015, Rd
 
     32 e. general formula AI3mAP[5]4MH[6]2MH2MO8(Si2O7)4(PO4)m(XMO)4(XAO)4, m = 2
Bornemanite Na6(Na)Ba2Ti2Nb2(Na5)Ti2(Si2O7)4(PO4)2O4(OH)2F2 IMA 1973-053, Rd
 
     32 f. general formula AP[5]2MH[6]2MH2MO4(Si2O7)2(XO)4(XM,AP)2
Saamite (Ba)TiNbNa3Ti(Si2O7)2O2(OH)2(H2O)2 IMA 2013-083, Rd
 
     32 g. general formula AP[5]2MH[6]2MHMO4(Si2O7)2(XO)4(XMP)(H2O)3
Kazanskyite (Ba)TiNbNa3Ti(Si2O7)2O2(OH)2(H2O)(H2O)3 IMA 2011-007, Rd
 
     32 h. general formula AP[5]8MH[6]4MH4MO16(Si2O7)8(XO)16(XMP)4(XAP)3(H2O)5
Nechelyustovite (Na)2Ba4Ti4Nb4(Na11)Ti4(Si2O7)8O8(OH)8(H2O)12 IMA 2006-021, Rd
 
     32 i. general formula AP2MH2MO4(Si2O7)2(XMO)2(XAO)2(XMP)2
Delindeite Ba2Ti2(Na2)Ti(Si2O7)2(OH)2(H2O)2O2 IMA 1987-004, Rd
 
     32 k. probably related to Nechelyustovite, no structure analysis
Bykovaite (Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(H2O,F,OH)2(H2O)3.5 IMA 2003-044
 

Lamprophyllite group of the Seidozerite supergroup: 3 Ti (+ Nb + Fe + Mg) per formula unit (2 in the H (heteropolyhedral) and 1 in the O (octahedral) sheets).
Lamprophyllite: -2M and -2O polytypes.
Nabalamprophyllite: -2M and -2O polytypes.
Innelite: -1A and -2M polytypes.


 
9.BE.35. Murmanite group [Seidozerite supergroup]
 
     35 a. general formula AP2MH2MO4(Si2O7)2(XM,AO)4(XM,AP)4
Murmanite Na2Ti2Na2Ti2(Si2O7)2O4(H2O)4 Rd
 
     35 b. general formula AP2MH2MO4(Si2O7)2(XMO)2(XAO)2(XM,AP)4
Calciomurmanite (Ca)Ti2(Na)Ti2(Si2O7)2O2O(OH)(H2O)4 IMA 2014-103, Rd
Vigrishinite (Zn)Ti2(Na)Ti2(Si2O7)2O2O(OH)(H2O)4 IMA 2011-073, Rd
 
     35 c. general formula AP2MH2MO4(Si2O7)2(XM,AO)2(XMP)2(H2O)5
Kolskyite (Ca)Ti2Na2Ti2(Si2O7)2O4(H2O)2(H2O)5 IMA 2013-005, Rd
 
     35 d. general formula AP2MH2MO4(Si2O7)2(XMO)2(XAO)2
Schüllerite Ba2Ti2Na2Mg2(Si2O7)2O2F2 IMA 2010-035, Rd
 
     35 e. general formula AI3mAP2MH2MO4(Si2O7)2(PO4)m(XM,AO)4, m = 2
Lomonosovite Na6Na2Ti2Na2Ti2(Si2O7)2(PO4)2O4 Rd
 
     35 f. general formula AI3mAP2MH2MO4(Si2O7)2[PO3(OH)][PO2(OH)2](XMO)2(XAO)2
Betalomonosovite Na24Na2Ti2Na2Ti2(Si2O7)2[PO3(OH)][PO2(OH)2]O2OF Rd
 
     35 g. general formula AI3mAT3tAP2MH2MO4(Si2O7)2(PO4)m+t(XMO)2(XAO)2Ft
Quadruphite Na6Na2(CaNa)2Na2Ti2Na2Ti2(Si2O7)2(PO4)4O4F2 IMA 1990-026, Rd
Sobolevite Na6(Na2Ca)(NaCaMn)Na2Ti2Na2(TiMn)(Si2O7)2(PO4)4 O4(OF) IMA 1982-042, Rd
Polyphite Na6(Na4Ca2)2Na2Ti2Na2Ti2(Si2O7)2(PO4)6O4F4 IMA 1990-025, Rd
 
     35 h. general formula AP1MH3MO4(Si2O7)2(XO)4(XP)4
Selivanovaite NaTi3(Ti,Na,Fe,Mn)4(Si2O7)2O4(OH,H2O)4(H2O)n tric., P-1 IMA 2015-126

Murmanite group of the Seidozerite supergroup: 4 Ti (+ Nb + Fe + Mg + Mn) per formula unit (2 in the H (heteropolyhedral) and 2 in the O (octahedral) sheets).


 
9.BE.37. Phosphoinnelite
 
Phosphoinnelite Na3Ba4Ti3Si4O14(PO4)2O2F IMA 2005-022

Phosphoinnelite is a potential member of the Seidozerite supergroup. The formula does not fit exactly to a member of the Seidozerite supergroup. A structure analysis is necessary.


 
9.BE.40. Dovyrenite
 
Dovyrenite Ca6Zr(Si2O7)2(OH)4 IMA 2007-002

Dovyrenite has a modular structure with tobermorite-like and the rosenbuschite-like layers.


 
9.BE.42. Ericssonite group
 
Ericssonite BaMn2+2Fe3+(Si2O7)O(OH) IMA 1966-013, Rd
Ferroericssonite BaFe2+2Fe3+(Si2O7)O(OH) IMA 2010-025
Zinkgruvanite Ba2Mn2+2Fe3+(Si2O7)(SO4)O(OH) tric., P-1 IMA 2020-031


 
9.BE.45. Chevkinite group
 
     45 a. Chevkinite subgroup
Chevkinite-(Ce) Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 A
Christofschäferite-(Ce) (Ce,La,Ca)4(Ti,Fe)3(Fe,Ti)O8(Si2O7)2 mon. IMA 2011-107
Dingdaohengite-(Ce) (Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe3+)2Ti2O8(Si2O7)2 IMA 2005-014
Maoniupingite-(Ce) (Ce,Ca)4(Fe3+,Ti,Fe2+,)(Ti,Fe3+,Fe2+,Nb)4O8(Si2O7)2 IMA 2003-017
Polyakovite-(Ce) (Ce,Ca)4MgCr2(Ti,Nb)2O8(Si2O7)2 IMA 1998-029
Delhuyarite-(Ce) Ce4Mg(Fe,W)3O6(OH)2(Si2O7)2 mon., C2/m IMA 2016-091
 
     45 b. Perrierite subgroup
Matsubaraite Sr4Ti5O8(Si2O7)2 IMA 2000-027
Rengeite Sr4Ti4ZrO8(Si2O7)2 IMA 1998-055
Hezuolinite (Sr,REE)4Zr(Ti,Fe3+,Fe2+)2Ti2O8(Si2O7)2 IMA 2010-045
Perrierite-(Ce) Ce4MgFe3+2Ti2O8(Si2O7)2 A
Perrierite-(La) (La,Ce,Ca)4(Fe2+,Mn)(Ti,Fe3+,Al)4O8(Si2O7)2 IMA 2010-089
Strontiochevkinite (Sr,Ce,La)4Fe2+(Ti,Zr)4O8(Si2O7)2 IMA 1983-009
Karnasurtite-(Ce) CeTiAlSi2O7(OH)4·3H2O Q


 
9.BE.47. Stavelotite-(La)
 
Stavelotite-(La) La3Mn2+3Cu2+(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30 IMA 2004-014


 
9.BE.50. Fersmanite
 
Fersmanite Ca4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3 G


 
9.BE.52. Belkovite
 
Belkovite Ba3Nb6(Si2O7)2O12 IMA 1989-053


 
9.BE.55. Batisivite
 
Batisivite BaTi6(V,Cr)8(Si2O7)O22 IMA 2006-054


 
9.BE.57. Nasonite
 
Nasonite Ca4Pb6(Si2O7)3Cl2 G


 
9.BE.60. Melanotekite group
 
Kentrolite Pb2Mn3+2(Si2O7)O2 G
Melanotekite Pb2Fe3+2(Si2O7)O2 G


 
9.BE.62. Schlüterite-(Y)
 
Schlüterite-(Y) (Y,REE)2Al(Si2O7)(OH)2F mon., P21/c IMA 2012-015


 
9.BE.65. Rowlandite group
 
Magnesiorowlandite-(Y) Y4(Mg,Fe)(Si2O7)2F2 tric., P1 IMA 2012-010
Rowlandite-(Y) Y4Fe(Si2O7)2F2 tric., P1 A


 
9.BE.67. Rusinovite
 
Rusinovite Ca10(Si2O7)3Cl2 orth. IMA 2010-072


 
9.BE.70. Tilleyite
 
Tilleyite Ca5(Si2O7)(CO3)2 G


 
9.BE.72. Biraite-(Ce) group
 
Biraite-(La) La2Fe2+(Si2O7)(CO3) mon., P21/c IMA 2020-020
Biraite-(Ce) Ce2Fe2+(Si2O7)(CO3) mon., P21/c IMA 2003-037
Alexkuznetsovite-(La) La2Mn2+(Si2O7)(CO3) mon., P21/c IMA 2019-081
Alexkuznetsovite-(Ce) Ce2Mn2+(Si2O7)(CO3) mon., P21/c IMA 2019-118


 
9.BE.75. Cervandonite-(Ce)
 
Cervandonite-(Ce) (Ce,Nd,La)(Fe3+,Ti,Fe2+,Al)3O2(Si2O7)1-x+y(AsO3)1+x-y(OH)3x-3y IMA 1986-044


 
9.BE.77. Laurentianite
 
Laurentianite [NbO(H2O)]3(Si2O7)2[Na(H2O)2]3 trig., P3 IMA 2010-018



 
 
9.BF. Sorosilicates with mixed SiO4 and Si2O7 groups; cations in tetrahedral [4] and greater coordination
 
9.BF.05. Harstigite
 
Harstigite Ca6Be2Mn2+(SiO4)(Si2O7)2(OH)2 G


 
9.BF.10. Samfowlerite
 
Samfowlerite Ca14Mn3+3Zn2Be2Be6Si14O52(OH)6 IMA 1991-045


 
9.BF.15. Davreuxite
 
Davreuxite Mn2+Al6Si4O17(OH)2 G



 
 
9.BG. Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
 
9.BG.05. Epidote group [Epidote supergroup]
 
Clinozoisite Ca2Al3(Si2O7)(SiO4)O(OH) A
Niigataite CaSrAl3(Si2O7)(SiO4)O(OH) IMA 2001-055, Rn
Epidote Ca2(Al2Fe3+)(Si2O7)(SiO4)O(OH) G
Epidote-(Sr) CaSr(Al2Fe3+)(Si2O7)(SiO4)O(OH) IMA 2006-055
Hancockite CaPb(Al2Fe3+)(Si2O7)(SiO4)O(OH) Rn
Mukhinite Ca2(Al2V3+)(Si2O7)(SiO4)O(OH) IMA 1968-035
Piemontite Ca2(Al2Mn3+)(Si2O7)(SiO4)O(OH) A
Piemontite-(Sr) CaSr(Al2Mn3+)(Si2O7)(SiO4)O(OH) IMA 1989-031, Rn
Piemontite-(Pb) CaPb(Al2Mn3+)(Si2O7)(SiO4)O(OH) IMA 2011-087
Tweddillite CaSr(Mn3+2Al)(Si2O7)(SiO4)O(OH) IMA 2001-014, Rn


 
9.BG.10. Allanite group [Epidote supergroup]
 
Dissakisite-(Ce) CaCe(Al2Mg)(Si2O7)(SiO4)O(OH) IMA 1990-004
Dissakisite-(La) CaLa(Al2Mg)(Si2O7)(SiO4)O(OH) IMA 2003-007
Allanite-(Y) CaY(Al2Fe2+)(Si2O7)(SiO4)O(OH) FOTO Rn
Allanite-(Ce) CaCe(Al2Fe2+)(Si2O7)(SiO4)O(OH) FOTO Rn
Allanite-(La) CaLa(Al2Fe2+)(Si2O7)(SiO4)O(OH) IMA 2003-065
Allanite-(Nd) CaNd(Al2Fe2+)(Si2O7)(SiO4)O(OH) IMA 2010-060
Ferriallanite-(Ce) CaCe(Fe3+AlFe2+)(Si2O7)(SiO4)O(OH) IMA 2000-041
Ferriallanite-(La) CaLa(Fe3+AlFe2+)(Si2O7)(SiO4)O(OH) IMA 2010-066
Vanadoallanite-(La) CaLa(V3+AlFe2+)(Si2O7)(SiO4)O(OH) IMA 2012-095
Manganiakasakaite-(La) CaLa(Mn3+AlMn2+)(Si2O7)(SiO4)O(OH) IMA 2017-028
Ferriakasakaite-(La) CaLa(Fe3+AlMn2+)(Si2O7)(SiO4)O(OH) IMA 2013-126
Ferriakasakaite-(Ce) CaCe(Fe3+AlMn2+)(Si2O7)(SiO4)O(OH) mon., P21/m IMA 2018-087
Uedaite-(Ce) MnCe(Al2Fe2+)(Si2O7)(SiO4)O(OH) IMA 2006-022
Manganiandrosite-(La) MnLa(Mn3+AlMn2+)(Si2O7)(SiO4)O(OH) IMA 1994-048, Rn
Manganiandrosite-(Ce) MnCe(Mn3+AlMn2+)(Si2O7)(SiO4)O(OH) IMA 2002-049
Ferriandrosite-(La) MnLa(Fe3+AlMn2+)(Si2O7)(SiO4)O(OH) IMA 2013-127
Vanadoandrosite-(Ce) MnCe(V3+AlMn2+)(Si2O7)(SiO4)O(OH) IMA 2004-015


 
9.BG.15. Dollaseite group [Epidote supergroup]
 
Dollaseite-(Ce) CaCe(MgAlMg)(Si2O7)(SiO4)F(OH) Rd
Khristovite-(Ce) CaCe(MgAlMn2+)(Si2O7)(SiO4)F(OH) IMA 1991-055


 
9.BG.20. Åskagenite-(Nd) [Epidote supergroup]
 
Åskagenite-(Nd) Mn2+Nd(Al2Fe3+)(Si2O7)(SiO4)O2 IMA 2009-073


 
9.BG.25. Zoisite
 
Zoisite Ca2Al3(Si2O7)(SiO4)O(OH) orth., Pnma G
Zoisite-(Pb) CaPbAl3(Si2O7)(SiO4)O(OH) orth., Pnma IMA 2021-025


 
9.BG.30. Sursassite group
 
Sursassite Mn2+2Al3(SiO4)(Si2O7)(OH)3 G
Macfallite Ca2Mn3+3(SiO4)(Si2O7)(OH)3 IMA 1974-057


 
9.BG.35. Pumpellyite group
 
Pumpellyite-(Al) Ca2Al3(Si2O7)(SiO4)(OH,O)2·H2O IMA 2005-016
Pumpellyite-(Mg) Ca2MgAl2(Si2O7)(SiO4)(OH)2·H2O Rn
Pumpellyite-(Mn2+) Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2·H2O IMA 1980-006, Rn
Pumpellyite-(Fe2+) Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2·H2O Rn
Pumpellyite-(Fe3+) Ca2(Fe3+,Mg)Al2(Si2O7)(SiO4)(OH,O)2·H2O Rn
Julgoldite-(Mg) Ca2MgFe3+2(Si2O7)(SiO4)(OH)2·H2O Rn
Julgoldite-(Fe2+) Ca2Fe2+Fe3+2(Si2O7)(SiO4)(OH)2·H2O IMA 1966-033, Rn
Julgoldite-(Fe3+) Ca2Fe3+Fe3+2(Si2O7)(SiO4)O(OH)·H2O Rn
Okhotskite Ca2(Mn,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2·H2O IMA 1985-010a
Shuiskite-(Mg) Ca2MgCr2(Si2O7)(SiO4)(OH)2·H2O IMA 1980-061, Rn
Shuiskite-(Cr) Ca2CrCr2(Si2O6OH)(SiO4)(OH)2O mon., C2/m IMA 2019-117
Poppiite Ca2(V3+,Fe3+,Mg)V3+2(Si2O7)(SiO4)(OH,O)2·H2O IMA 2005-018


 
9.BG.40. Ganomalite group
 
Wayneburnhamite Pb9Ca6(Si2O7)3(SiO4)3 hex., P-6 IMA 2015-124
Ganomalite Pb9Ca5Mn(Si2O7)3(SiO4)3 G


 
9.BG.45. Rustumite
 
Rustumite Ca10(Si2O7)2(SiO4)(OH)2Cl2 IMA 1964-004


 
9.BG.50. Vesuvianite group
 
Vesuvianite (Ca,Na)19(Al,Mg,Fe)13(Si2O7)4(SiO4)10(OH,F,O)10 A
Fluorvesuvianite Ca19(Al,Mg)13(Si2O7)4(SiO4)10O(F,OH)9 IMA 2000-037
Magnesiovesuvianite Ca19Mg(Al11Mg)(Si2O7)4(SiO4)10O(OH)9 IMA 2015-104
Alumovesuvianite Ca19Al(Al10Mg2)(Si2O7)4(SiO4)10O(OH)9 IMA 2016-014
Manganvesuvianite Ca19Mn3+(Al10Mg2)(Si2O7)4(SiO4)10O(OH)9 IMA 2000-040
Milanriederite (Ca,REE)19Fe3+Al4(Mg,Al,Fe)8)(Si2O7)4(SiO4)10O(OH)9 tetr., P4/nnc IMA 2018-041
Wiluite Ca19(Al,Mg)13(B,,Al)5(Si2O7)4(SiO4)10(O,OH)10 IMA 1997-026
Cyprine Ca19Cu2+(Al,Mg)12(Si2O7)4(SiO4)10O(OH)9 IMA 2015-044
Hongheite Ca19Fe2+Al4(Fe3+,Mg,Al)8(,B)4B(Si2O7)4(SiO4)10(O,OH)10 IMA 2017-027
Manaevite-(Ce) Ca11(Ce,H2O,Ca)8Mg(Al,Fe)4(Mg,Ti,Fe)8(Si2O7)4[(SiO4)8(H4O4)2](OH)9 tetr., P4/nnc IMA 2018-046


 
9.BG.55. Vyuntspahkite-(Y)
 
Vyuntspahkite-(Y) Y(Al,Si)(SiO4)(OH,O)2 IMA 1982-040


 
9.BG.60. Dellaite
 
Dellaite Ca6(Si2O7)(SiO4)(OH)2 IMA 1964-005


 
9.BG.65. Gatelite-(Ce) group [Gatelite supergroup]
 
Gatelite-(Ce) (CaCe3)(AlAl2Mg)(Si2O7)(SiO4)3O(OH)2 mon., P21/a IMA 2001-050
Perbøeite-(La) (CaLa3)(AlAl2Fe2+)(Si2O7)(SiO4)3O(OH)2 mon., P21/m IMA 2018-116
Perbøeite-(Ce) (CaCe3)(AlAl2Fe2+)(Si2O7)(SiO4)3O(OH)2 mon., P21/m IMA 2011-055
Ferriperbøeite-(La) (CaLa3)(Fe3+Al2Fe2+)(Si2O7)(SiO4)3O(OH)2 mon., P21/m IMA 2018-106
Ferriperbøeite-(Ce) (CaCe3)(Fe3+Al2Fe2+)(Si2O7)(SiO4)3O(OH)2 mon., P21/m IMA 2017-037


 
9.BG.70. Västmanlandite-(Ce) [Gatelite supergroup]
 
Västmanlandite-(Ce) (CaCe3)(MgAl2Mg)(Si2O7)(SiO4)3F(OH)2 mon., P21/m IMA 2002-025


 
9.BG.75. Alnaperbøeite-(Ce) [Gatelite supergroup]
 
Alnaperbøeite-(Ce) (CaCe2.5Ce0.5)(AlAl2Al)(Si2O7)(SiO4)3O(OH)2 mon., P21/m IMA 2012-054


 
9.BG.80. Radekškodaite-(La)
 
Radekškodaite-(La) (CaLa5)(Al4Fe2+)(Si2O7)(SiO4)5O(OH)3 mon., P21/m IMA 2018-107
Radekškodaite-(Ce) (CaCe5)(Al4Fe2+)(Si2O7)(SiO4)5O(OH)3 mon., P21/m IMA 2019-042



 
 
9.BH. Sorosilicates with Si3O10, Si4O13 groups; cations in tetrahedral [4] and greater coordination
 
9.BH.05. Aminoffite
 
Aminoffite Ca3(BeOH)2Si3O10 G


 
9.BH.10. Kinoite
 
Kinoite Ca2Cu2Si3O10·H2O IMA 1969-037


 
9.BH.15. Akatoreite
 
Akatoreite Mn2+9Al2Si8O24(OH)8 IMA 1969-015


 
9.BH.20. Bunnoite
 
Bunnoite Mn2+6AlSi6O18(OH)3 tric., P-1 IMA 2014-054


 
9.BH.25. Fencooperite
 
Fencooperite Ba6Fe3+3Si8O23(CO3)2Cl3·H2O IMA 2000-023



 
 
9.BJ. Sorosilicates with Si3O10, Si4O13 and other groups; cations in octahedral [6] and greater coordination
 
9.BJ.05. Rosenhahnite
 
Rosenhahnite Ca3Si3O8(OH)2 IMA 1965-030


 
9.BJ.10. Trabzonite
 
Trabzonite Ca4[Si3O9(OH)](OH) IMA 1983-071a


 
9.BJ.15. Thalénite-(Y)
 
Thalénite-(Y) Y3Si3O10F Rd


 
9.BJ.20. Kilchoanite
 
Kilchoanite Ca6(SiO4)(Si3O10) G


 
9.BJ.25. Pavlovskyite
 
Pavlovskyite Ca8(SiO4)2(Si3O10) orth., Pbcn IMA 2010-063


 
9.BJ.30. Orientite
 
Orientite Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10·4H2O G


 
9.BJ.35. Cassagnaite
 
Cassagnaite Ca4Fe3+4V3+2(SiO4)2(Si3O10)O2(OH)6 IMA 2006-019a


 
9.BJ.40. Ardennite group
 
Ardennite-(As) Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6 orth., Pmmn FOTO Rn
Ardennite-(V) Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 orth., Pmmn IMA 2005-037
Kannanite Ca4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 orth., Pmmn IMA 2015-100
Alpeite Ca4Mn3+2Al2(Mn3+Mg)(VO4)(SiO4)2(Si3O10)(OH)6 orth., Pmmn IMA 2016-072


 
9.BJ.45. Kornerupine group
 
Kornerupine (Mg,Fe2+,Al,)10(Si,Al,B)5O21(OH,F)2 G
Prismatine (Mg,Al,Fe)6Al4(Si,Al)4(B,Si,Al)(O,OH,F)22 Rd


 
9.BJ.50. Demagistrisite
 
Demagistrisite BaCa2Mn3+4(Si2O7)(Si3O10)(OH)4·3H2O orth., Amm2 IMA 2018-059


 
9.BJ.55. Lavoisierite
 
Lavoisierite Mn2+8Al10(Mn3+Mg)(PO4)(SiO4)4(Si2O7)2(Si3O10)(OH)12 orth., Pnmm IMA 2012-009


 
9.BJ.60. Hubeite
 
Hubeite Ca2Mn2+Fe3+[Si4O12(OH)]·2H2O IMA 2000-022


 
9.BJ.65. Ruizite group
 
Ruizite Ca2Mn3+2[Si4O11(OH)2](OH)2·2H2O IMA 1977-007
Taniajacoite CaSrMn3+2[Si4O11(OH)2](OH)2·2H2O tric. IMA 2014-107
Strontioruizite Sr2Mn3+2[Si4O11(OH)2](OH)2·2H2O IMA 2017-045


 
9.BJ.70. Tiragalloite
 
Tiragalloite Mn2+4[As5+Si3O12(OH)] mon., P21/n IMA 1979-061


 
9.BJ.75. Medaite group
 
Arsenmedaite Mn2+6As5+Si5O18(OH) IMA 2016-099
Medaite Mn2+6V5+Si5O18(OH) IMA 1979-062


 
9.BJ.80. Zunyite
 
Zunyite Al13[Si5O16]O4(OH,F)18Cl G






 
 

G = Grandfathered minerals: original description preceded the establishment of the CNMNC in 1959, and generally regarded as a valid species
A or IMA No. = Minerals approved by the CNMNC
Rd = Redefinition of the mineral approved by the CNMNC
Rn = Renamed with approval by the CNMNC
Q = Questionable mineral


© Thomas Witzke (2022)


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