CLASSIFICATION OF MINERALS. 



777 



Thomsonite. 



Picrothonisonite. 



Liutonitc. 



Cblorastrolite. 

 Gisniondite. 



ITydronepbelite. 

 Ranite. 



Natrolite. 



Soolecite. 

 Mesolite. 



Foresite. 

 Wellsife. 

 Ediuntouite. 



Oflrelite. 



Apophyllite. 



Okenite. 



Centralassite. 



Xouotlite. 

 Gvrolite. 



Plomljierito 

 Inesite. 



Group 5S. 

 (Ca,Na,):,AlH(SiO,).3.7n,0. 



Ca,Al„(Si04)r,.12H:0. 



Group 59. 

 HNa.2Al;,(Si04):,.3H,0. 



Group GO. 

 H,NaAl..(Si0^):,. 



H,CaAl,(Si04):,.H,0. 

 H.sCaNa,AL(Si04)6.H,0. 



H,oCaXa:Al4(Si006.H20. 

 H4(Ba,Ca,K,)Al,(Si04):,.H.20. 



H,BaAl.(Si04);,.H,0. 



Group 61. 

 H.Ca:Al„(Si04j„.l(>H,0. 



Group G2. 

 H„Ca2(CaOH),(Si.207)3. 



Group 63. 

 H,Ca,(Si,07)3. 



H,oCa4(Si,07)3. 

 Group 64. 



H.Ca:Si207.3H,0. 

 n>(Mn,Ca),Si,07.3II,0. 



THE MICAS. 



Orthoihombic. 



Monoclinic. 



Hexagon aL 



Ortliorbonibic aud 



monoclinic. 

 Monoclinic. 

 Monoclinic ;nul tri- 



clinic. 

 Monoclinic. 

 Monoclinic. 

 Ortborbombic. 



(?) 

 Tetragonal. 

 Ortborbombic (?). 



(?) 



(?) 

 Triclinic. 



The minerals included iu groups 65 to 08 all possess a characteristic 

 structure, having a highly perfect basal cleavage, readily affording thin 

 lamina. They are silicates of aluminum, with potassium, sodium, iron, 

 and magnesium chiefly, and all yield water upon ignition. 



Muscovite. 



Damonritc. 



Margarodite. 



Fucbsite. 



Avalite. 



Ocllacberite. 



Eupbyllite. 



Mariposite. 



Group Go. Tbe Micas. 



H,KAl;i(Si04)3. 



Monoclinic. 



