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Dana 8 Classification

55 Sorosilicate Minerals

55.02 Sorosilicates Sorosilicate Si2O7 Groups, Generally with No Additional Anions with cations in [6] coordination

55.02.01a Thortveitite group

Gittinsite CaZrSi2O7 monoklin C2 2 55.02.01a.01
Keiviite-(Y) (Y,Yb)2Si2O7 monoklin C2/m 2/m 55.02.01a.02
Keiviite-(Yb) (Yb,Y)2Si2O7 monoklin C2/m 2/m 55.02.01a.03
Thortveitite (Sc,Y)2Si2O7 monoklin C2/m 2/m 55.02.01a.04

55.02.01b Thortveitite related species

Rowlandite-(Y) Fe2+Y4(Si2O7)2F2 triklin 55.02.01b.01
Thalénite-(Y) Y3Si3O10F monoklin P21/n 2/m 55.02.01b.02
Yttrialite-(Y) Y2Si2O7 monoklin P21/m 2/m 55.02.01b.03
Fluorthalénite-(Y) Y3[F|Si3O10] monoklin P21/n 2/m 55.02.01b.04

55.02.02 Keldyshite group

Keldyshite Na2-xHxZrSi2O7·n H2O triklin P1 1 55.02.02.01
Khibinskite K2ZrSi2O7 monoklin C2, Cm, C2/m 2, m, 2/m 55.02.02.02
Parakeldyshite Na2ZrSi2O7 triklin P1 1 55.02.02.03

55.02.03

Barysilite Pb8Mn(Si2O7)3 trigonal R3c 3m 55.02.03.01

55.02.04

Percleveite-(Ce) (Ce,La,Nd)2[Si2O7] tetragonal P41 4 55.02.04.01



Mineralsystematik-Übersicht