Clifton College Sdentjiic Society. 



65 



SILICATES— Co«<M»<e(/. 



Name. 



Bronzite 

 Corciicrite. In Quartz 



^^'ith Blende, Mica, 



and Pyrite . . 

 Do. (Finite) on Felspar 

 Coccolite 



Ehodonite. With ) 

 veins of Pyrolusite j 



Chondrodite. (Huniite) 

 Olivine. Eolled crystals 



Beryl. SLs-sided prisms 



Spliene 



Scapolite 



Nephelhie (Sonimite) 



Andalusite. Amor- \ 

 pilous and in six- f 

 sided j)risms with i 

 Quartz . . . . / 



Spodumene. Lamel- ^ 

 lar crvstals . . . . 1 



Formula. 



(Mg Fe) O, SiOg 

 I 2 (MgO, SiO-. ) -f \ 

 \ 2 AI2 O3, 3 SiOz / 



MnO, SiOa 



2(MgO,.3si62)+MgF 



2 M„0, Si02 

 ( AI2 0;^: 3 SiO, -I- \ 

 I 3 GO, SiOs ) 



( 2 CaO, SiOa -f CaO, \ 

 \ 2 TiOs / 



/ 3 (3 CaO, Si02 )+ ) 

 I 2 ( AI2 O3. 3 SiO ) 1 

 ( 4E*0, Si02 -f 

 4AI2 O3, 5 Si02 

 ( * E=Xa, K, Ca 



AI2 O3. Si02 



( 3 LiO.SiO, 4- 

 ( 4AI2 O3, Si02 



Locality. 



Tyrol 



Bodcnniais, Bavaria 



KUliney, Co. Dublin 

 Norway 



Devonshire 



Lothringen 

 New Jersey 

 Tahiti 



Iceland 

 Maria Kirch 



Somma 



Ireland 



HYDEOUS SILICATES. 



Formula. 



f 2 (CaO, SiOs )+ ) 

 ( AI2 O3, Si02 4- HO / 



/ CaO, 3 SiOs + \ 

 lAl3 03,3SiO-'-f6HO j 



f CaO, 3 SiOa -|- ) 

 1 AI2 Oj.3Si02 4-5HO i 



(Mg Fe) O, SiOs -f HO 



NaO,Si02 +AI2 O3 

 3 Si02 +2 HO 



Locality. 



Fassa Thai, Tj-rol 



f Ecichcnbach, Upper 

 \ Palatinate 



Faroe 



Lochwiunock, Glasgow 



Faroe 



Portsoy, Banffshu'C 



Iceland 



Fassa Thai, Tyi-ol 



