and their allied Compounds. 275 



2Si O 3 , 2H 2 ; sideroschisolite, 6FeO, Si O 3 , 3 (or 2) H 2 ; 

 chamoisite ; hisingerite, 3RO, 2Fe 2 O 3 , 3Si O 3 , 6H 2 ; thrau- 

 lite ; gillingite ; crocidolitc ; chlorophseite ; carpholite, 3RO, 

 3A1 2 3 , 4Si0 3 , 6H 2 ; pyrosmalite, 12RO, Fe 2 3 , 8Si0 3 , 6H 2 

 + Fe 3C1, = 12RO + (Fe 2 O 3 , Fe Ci 3 , 8Si0 3 , 6H 2 0) = rR, if 

 3H 2 = 1R 2 3 or ISiO 3 . Appendix :— Pyrophyllite ; anthosi- 

 derite. 



Kollyrite Type : — consisting principally of earthy semi-decom- 

 posed minerals, for the most part hydrated silicates of alumina 

 or sesquioxide of iron. The water is chiefly hygroscopic. 



Kollyrite, scarbroite, halloysite, lenzinite, allophane, schrot- 

 terite (opal-allophane), nontronite, chloropal, pinguite, cimolite, 

 lithomarge (including myeline, carnatite, &c), tuesite, bole, mal- 

 thasite, catlinite, samoite, razoumoffskin, myloschin or Serbian, 

 wolchonskoite, chrome-ochre, smelite, fuller's earth, &c. 



Iolite Type : — Trimetric. 



Iolite, 3RO, 2Si0 3 + 3(R 2 3 , SiO 3 ). Metamorphic products: 

 Pinite = iolite + 2H 2 or 3H 2 0; chlorophyllite = iolite + 2 H 2 0; 

 esmarkite = iolite + 3H 2 0; gigantolite, same formula as esmar- 

 kite ; bonsdorflite, fahluuite, = iolite + 6H 2 ; praseolite = 

 iolite — SiO 3 + 3H 2 ; aspasiolite, &c. 



Barsovvite, 3RO, 2Si0 3 + 3(Al 2 3 , SiO 3 ) ; bytownite, 3RO, 

 2Si0 3 + 3(A1 2 3 , SiO 3 ) . The crystallization of these two mine- 

 rals is not yet known. Hermann refers the latter to lepolite. 



Feldspar Type : — Monoclinic. 



Ryacolite, (NaO KO), Si0 3 + Al 2 3 , SiO 3 ; loxoclase, RO, 

 Si0 3 + Al 2 3 , 2Si0 3 ; orthoclase (feldspar), KO, Si0 3 + Al 2 3 , 

 3Si0 3 ; petalite, 3(LiO, NaO), 4Si0 3 + 4(Al 2 3 , 4Si0 3 ) ; kas- 

 tor, LiO, 3Si0 3 + 2(A1 2 3 , 3Si0 3 ) j couseranite, 3RO, SiO 3 

 + A1 2 3 , SiO 3 ; saussurite, 3RO, SiO 3 + 2(A1 2 O 3 , SiO 3 ) j bau- 

 lite, RO, 2Si0 3 +A1 2 3 , 6Si0 3 . Appendix :■— Obsidian, pitch- 

 stone, &c. 



Albite Type : — Triclinic. 



Anorthite, 3RO, Si 3 + 3(Al 2 3 , SiO 3 ); lepolite, same for- 

 mula as anorthite; spodumene(?); vosgite,3(RO, SiO 3 ) + 3A1 2 3 , 

 2Si0 3 ; hyposclerite, 3(110, SiO 8 ) +2A1 2 O 3 , 3Si0 3 ; labrador- 

 ite, RO, SiO s + Al 2 3 , SiO 3 ; chladnite (?), MgO, SiO 3 from 

 Shepherd's analysis; latrobite, 3110, SiO 3 + 4(A1 2 3 , SiO 3 ) ; an- 

 desine, BBO, 28iO» + SfAl'O 8 , 2Si0 3 ) ; oligoclase, RO, SiO 3 

 -I- Al 2 3 , 2 Si 0" ; albite, NaO, Si O 3 + Al 2 3 , 3Si O 3 . Appen- 

 «*:— Cheeterhte, 8RO > 2SiO»+2(Al 9 8 J 3Si0 3 ); Keradtfe green 

 feldspar from Bodenmau (Liebig's First Report, vol. ii. p. 409 

 of Dr. Hofinaun's translation), same formula. 



T 2 



