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Dana 8 Systematik

55 Sorosilicate Minerals

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

55.02.01a Thortveitite group

Gittinsit CaZrSi2O7 monoklin C2 2 55.02.01a.01
Keiviit-(Y) (Y,Yb)2Si2O7 monoklin C2/m 2/m 55.02.01a.02
Keiviit-(Yb) (Yb,Y)2Si2O7 monoklin C2/m 2/m 55.02.01a.03
Thortveitit (Sc,Y)2Si2O7 monoklin C2/m 2/m 55.02.01a.04

55.02.01b Thortveitite related species

Rowlandit-(Y) Fe2+Y4(Si2O7)2F2 triklin 55.02.01b.01
Thalénit-(Y) Y3Si3O10F monoklin P21/n 2/m 55.02.01b.02
Yttrialith-(Y) Y2Si2O7 monoklin P21/m 2/m 55.02.01b.03
Fluorthalénit-(Y) Y3[F|Si3O10] monoklin P21/n 2/m 55.02.01b.04

55.02.02 Keldyshite group

Keldyshit Na2-xHxZrSi2O7·n H2O triklin P1 1 55.02.02.01
Khibinskit K2ZrSi2O7 monoklin C2, Cm, C2/m 2, m, 2/m 55.02.02.02
Parakeldyshit Na2ZrSi2O7 triklin P1 1 55.02.02.03

55.02.03

Barysilit Pb8Mn(Si2O7)3 trigonal R3c 3m 55.02.03.01

55.02.04

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

55.03 Sorosilicates Sorosilicate Si2O7 Groups, Generally with No Additional Anions with cations in [7] coordination

55.03.01

Rankinit Ca3Si2O7 monoklin P21/a 2/m 55.03.01.01

55.03.02

Jaffeit Ca6Si2O7(OH)6 trigonal P3 3 55.03.02.01

55.04 Sorosilicates Sorosilicate Si2O7 Groups, Generally with No Additional Anions with cations in [8] and lower coordination

55.04.01 Melilite group

Åkermanit Ca2MgSi2O7 tetragonal P421m 42m 55.04.01.01
Gehlenit Ca2Al(AlSi)O7 tetragonal P421m 42m 55.04.01.02
Okayamalith Ca2B[BSiO7] tetragonal P421m 42m 55.04.01.04

55.04.02 Fresnoite group

Fresnoit Ba2TiSi2O8 tetragonal P4bm 4mm 55.04.02.01
Hardystonit Ca2ZnSi2O7 tetragonal P421m 42m 55.04.02.02
Jeffreyit (Ca,Na)2(Be,Al)Si2(O,OH)7 orthorhombisch C2221 222 55.04.02.03
Leukophan NaCaBeSi2O6F orthorhombisch P212121 222 55.04.02.04
Meliphanit Ca4(Na,Ca)4Be4AlSi7O24(F,O)4 tetragonal I4 4 55.04.02.05
Gugiait Ca2BeSi2O7 tetragonal P421m 42m 55.04.02.06

55.04.03

Belkovit Ba3(Nb,Ti)6(Si2O7)2O12 hexagonal P62m 6m2 55.04.03.01

55.05 Sorosilicates Sorosilicate Si2O7 Groups, Generally with No Additional Anions with dimeric cations

55.05.01

Edgarbaileyit Hg61+Si2O7 monoklin C2/m, Cm, C2 2/m, m, 2 55.05.01.01



Mineralsystematik-Übersicht