CLARKE.] SUMMARY. 103 
Haiiynite Al 2 (Si0 4 ) 3 Xa 2 Ca(AlS0 4 Na) 
Nosite Al 2 (Si0 4 ) 3 Na 4 (AlS0 4 Na) 
Lazurite Al 2 (Si() 4 ) 3 Na 4 (AlS 3 Na) 
Garnet group R /// 2 (Si0 4 ) 3 R" 3 
Epidote group R /// 2 (Si0 4 ) 3 R" 2 (R /// OH) 
Leucite Al 2 (Si0 4 )(Si 3 8 ) 2 K 4 ( AlSi0 4 Al) 
Analcite Similar to leucite. 
Pollucite Similar to leucite. 
Marialite Al 2 (Si 3 O 8 ) 3 Na 4 (A101) 
Double type, R'" i X 6 R" 6 . 
Mesolite - Al 4 (SiO 4 ) 6 0aXa 2 H 8 .H 2 O 
Foresite Al-(SiO 4 ) 6 OaH 10 .H 2 O 
Conjugate type, R'" 2 X 5 R" 7 . 
Vesuvianite Al 2 (Si0 4 ) 5 R"6(AlOH) 
Gehlenite Al 2 (Si0 4 ) 5 E // 6 (A10 2 Mg) 2 
Melilite Al 2 (Si0 4 ) 4 (Si0 3 )R" 
D. Third substitution series. 
/X=R' 3 
TypeR— X = R' 3 
\x = R' 3 
Phlogopite Al(Si0 4 ) 3 Mg 3 KH 2 
Phlogopite-vermiculite Al(Si0 4 ) 3 Mg 3 H 3 .3H 2 
Phlogopite-chlorite Al(Si0 4 ) 3 (MgOH) 6 H 3 
Manganopbyll (AlFe)(Si0 4 ) 3 (MnMg) 3 KH 2 
Ganophyllite AlX 3 Mn 3 R' 3 .2H 2 
Stilpnomelane Al(Si 3 8 ) 3 (FeOH) 6 H 3 
Faujasite Al(Si 3 8 ) 3 R / 5 R // 2 .15H 2 
Cerite 0e(SiO 4 ) 3 (CeO) 3 H 6 
Double type, E"'. 2 X 6 R l i S . 
Staurolite Al 2 (Si0 4 ) 6 Fe // 3 (A10) 12 
Harstigite Al 2 (Si0 4 ) 6 Ca 5 iMn 2 H 4 
E. Basic salts. 
Westauite A10H(Si0 4 ) 2 Al 2 
Kaolin A10H(Si0 4 ) 2 AlH 3 
Montmorillonite A10H(Si0 4 ) 2 H 6 
Newtonite Al(OH) 2 (SiG 4 )H 3 
Margarite , A10H(Si0 4 ) 2 CaH(AiO) 3 
Strigovite A10H(Si0 4 ) 2 AlH(FeOH) 2 
Aphrosiderite A10H(Si0 4 ) 2 Al(FeOH) 3 
Lepidolite type AlF 2 (Si 3 8 )R / 3 
Cookeitetype Al(OH) 2 (Si0 4 )R / 3 
Clintonite type A10 2 Mg(Si0 4 )R / 3 
Clintonite-vermiculite A10 2 Mg(Si0 4 )R / 3 .3H 2 
Chloritoid A10 2 Fe(Si0 4 )H(A10H) 
Ottrelite A10 2 Fe(Si 3 8 )H(A10H) 
