2. Finit. [RF(H)] 8 Si 5 . 
(Aspasiolith , Gieseckit). 
Rhombisch ; homoomorph mit Cordierit = (RF) 8 Si 5 . 
3. Margarit. ([RF (H-)] 4 Si + n [ RF(H-)] 1 Si). 
a) Krystal lisirter Margarit. 
(Masonit, ïalcit, Damoiirit, Scricit, Pyi'ophyllit, Emerylith, Corundelit, Euphyllit, Gilbertit, Perlglimmer.) 
Wahrscheinlich homoomorph mit zweiaxigem Glimmer. (a) = [RF(H-) 4 Si 
(b) = [RF 
Dicht. 
1 Si. R = (Fe, Mg, Ca, K); F = (Al, Fe 
A-Margarit (a) i 
7e 
V 5 
7. 
do. 
do. 
do. 
7s do. 
Va do. 
7-i do. 
7i do. 
7a do. 
do. 
do. 
Masonit. 
/i 
7 , 
do. 
do. 
(ga + b) (Perlglimmer, Emerylith). 
(5a + b) ) 
(3a 4~ b) i 
(3a + 2b)j 
(2a + b) (Corundelit, Diphanit). 
(4a -H 3b) Euphyllit. 
(a 4- 2b) (Gilbertit, Taleit). 
(2a + 5b) 1 
. Margarodit. 
(a + 3b)( 
(2a 4- 7 b) Sericit. 
(a -f- 5b) Damourit. 
(a + 18b) Pyroplivllit von Pyschminsk. 
b) Dichter Margarit oder Agalmatolith. 
(Dysintribit). 
7i Agalmatolith (a 4- 4b) Dysintribit. 
e /i do. (a 4- 6b) | 
9 A 
do. 
a 
9b) I 
Agalmatolith. 
4. Pyroxenoïde. (|RF(H-)f Si 4- n[RF(H)] 2 Si 3 ). 
Si 4- n(RF)- Si 3 ! 
Homoomorph mit Pyroxen (Amphibol) 
(a) = [RF(H)f Si; (b) = [RF (H) 2 Si 3 . 
