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Strunz Classification System

VIII  -  Silicates

Mineral Formula Classification
E  -  Cyclosilicates
Series 1  -  Triplet rings [Si3O9]6-
Wadeite K2ZrSi3O9  VIII / E.1-40
Series 4  -  Triplet rings [Si3O9]6- 
Catapleiite Na2ZrSi3O9 · 2H2 VIII / E.4-10
Gaidonnayite Na2ZrSi3O9 · 2H2 VIII / E.4-30
Series 5  -  Insular SiO4; borosilicates and some beryllosilicates
Stillwellite-(Ce) (Ce,La,Ca)BSiO5  VIII / E.5-20
Series 7  -  Quadruplet rings [Si4O11]8-
Tsepinite-Na (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O) · 3H2O VIII / E.7-30
Korobitsynite Na3(Ti,Nb)2[Si4O12]
     (OH,O)2 · 3-4H2O
VIII / E.7-80
Labuntsovite (K,Ba,Na)(Ti,Nb)(Si,Al)2
     (O,OH)7 · H2
VIII / E.7-100
Nenadkevichite (Na,Ca,K)(Nb,Ti)Si2O6
     (O,OH) · 2H2
VIII / E.7-140
Vuonnemite Na11Nb2Ti3+Si4O12(PO4)2O5F2  VIII / E.7-180
Phosinaite-(Ce) Na13Ca2(Ce,La)[(PO4)4|Si4O12 VIII / E.7-185
Epistolite Na5Ti3+Nb2Si4O12O5F · 5H2 VIII / E.7-190
Series 8  -  Quadruplet rings [Si4O11]8-
Joaquinite-(Ce) Ba2NaCe2Fe2+(Ti,Nb)2Si8O26
     (OH,F) · H2
VIII / E.8-80
Orthojoaquinite-(Ce) Ba2NaCe2Fe2+Ti2Si8O26
     (O,OH) · H2
VIII / E.8-90
Series 9  - 
Kainosite-(Y) Ca2(Y,Ce)2Si4O12(CO3) · H2 VIII / E.9-10
Series 10  -  Double quadruplet rings [Si8O20]8-
Ekanite ThCa2Si8O20 VIII / E.10-10
Steacyite Th(Ca,Na)2K1-xSi8O20  VIII / E.10-30
Series 12  -  Six rings [Si6O18]12-
Beryl Be3Al2Si6O18  VIII / E.12-10
Cordierite Mg2Al4Si5O18  VIII / E.12-40
Series 16  -  Six rings [Si6O18]12-
Kapustinite Na5.5Mn0.25ZrSi6O16(OH)2 VIII / E.16-23
Litvinskite Na2([ ],Na,Mn)ZrSi6O12(OH,O)6 VIII / E.16-25
Lovozerite Na2Ca(Zr,Ti)Si6(O,OH)18  VIII / E.16-30
Petarasite Na5Zr2Si6O18(Cl,OH) · 2H2 VIII / E.16-70
Series 17  -  Six rings [Si6O18]12-
Abenakiite-(Ce) Na26(Ce,Nd,La,Pr,Th,Sm)6(SiO3)6
    (PO4)6(CO3)6(S4+O2)O] 
VIII / E.17-5
Steenstrupine-(Ce) Na14Ce6Mn2+Mn3+Fe22+(Zr,Th)
    (Si6O18)2(PO4)7 · 3H2
VIII / E.17-10
Series 19  -  Six rings [Si6O18]12-
Dravite NaMg3Al6(BO3)3Si6O18(OH)4  VIII / E.19-20
Schorl NaFe32+Al6(BO3)3Si6O18(OH)4  VIII / E.19-50
Series 22  -  double six-rings [Si12O30]12-
Poudretteite KNa2B3Si12O30  VIII / E.22-10
Milarite K2Ca4Al2Be4Si24O60 · H2 VIII / E.22-20
Sugilite KNa2(Fe2+,Mn2+,Al)2Li3Si12O30  VIII / E.22-110
Series 23  -  Triplet rings, nine- rings and ten-rings
Eudialyte Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22
    (OH,Cl)2 
VIII / E.23-10
Series 25  -  Triplet rings, nine- rings and ten-rings
Ferrokentbrooksite Na15Ca6(Fe,Mn)3Zr3NbSi25O73
     (O,OH,H2O)3(Cl,F,OH)2
VIII / E.25-20
Kentbrooksite (Na,REE)15(Ca,REE)6Mn3Zr3
     NbSi25O74F2 · 2H2O
VIII / E.25-30
Oneillite Na15Ca3Mn3Fe3Zr3Nb(Si25O73)
     (O,OH,H2O)3(OH,Cl)2
VIII / E.25-40
Zirsilite-(Ce) (Na,[ ])12(Ce, Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3) · H2O VIII / E.25-56
Khomyakovite Na12Sr3Ca6Fe3Zr3W(Si25O73)
     (O,OH,H2O)3(OH,Cl)2
VIII / E.25-60
Manganokhomyakovite Na12Sr3Ca6Mn3Zr3W(Si25O73)
     (O,OH,H2O)3(OH,Cl)2
VIII / E.25-70


Strunz Classification System
I - II - III - IV - V - VI - VII - VIII/A - VIII/B - VIII/C -
VIII/D - VIII/E - VIII/F - VIII/G - VIII/H - VIII/J - SW