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Strunz 9 Classification

9 Silikate (Germanate)

9.B Gruppensilikate (Sorosilikate)

9.BC Si2O7 Gruppen, ohne nicht-tetrahedrale Anionen; Kationen in oktahedraler [6] und/oder anderer Koordination

9.BC.05 Thortveitit-Gruppe
Gittinsite CaZrSi2O7 monoklin C2 2
Keiviite-(Y) (Y,Yb)2Si2O7 monoklin C2/m 2/m
Keiviite-(Yb) (Yb,Y)2Si2O7 monoklin C2/m 2/m
Thortveitite (Sc,Y)2Si2O7 monoklin C2/m 2/m
Yttrialite-(Y) Y2Si2O7 monoklin P21/m 2/m

9.BC.10 Keldyshit-Gruppe
Keldyshite Na2-xHxZrSi2O7·n H2O triklin P1 1
Khibinskite K2ZrSi2O7 monoklin C2, Cm, C2/m 2, m, 2/m
Parakeldyshite Na2ZrSi2O7 triklin P1 1

9.BC.15 Rankinit-Gruppe
Rankinite Ca3Si2O7 monoklin P21/a 2/m

9.BC.20 Barysilith-Gruppe
Barysilite Pb8Mn(Si2O7)3 trigonal R3c 3m

9.BC.25 Edgarbaileyit-Gruppe
Edgarbaileyite Hg61+Si2O7 monoklin C2/m, Cm, C2 2/m, m, 2

9.BC.30 Kristiansenit-Gruppe
Kristiansenite Ca2Sc,Sn4+[Si2O6(OH)|Si2O7] triklin C1 1
Silesiaite Ca2Fe3+Sn(Si2O7)(Si2O6OH) triklin C1 1

9.BC.35

Percleveite-(Ce) (Ce,La,Nd)2[Si2O7] tetragonal P41 4
Percleveite-(La) La2Si2O7 tetragonal P41 4



Mineralsystematik-Übersicht