778 



Paragonite. 



Cossaite. 



Oncosine. 

 Lepidolite. 



Cookeite. 



Alurgite. 

 Zinnwaldite. 



Polylithionite. 



Protolithionitc. 

 Cryophyllite. 

 Biotite. 



Meroxcne. 



Ilaugbtoiiite. 



Lepi(li)uielane 



Siderophyllite. 



Barytliiotite. 



Rastolyto. 

 Phlogopite. 



Aspidolite. 



Manganopbyllite 



Giiuophyllite. 



Caswellite. 



Rubellai). 



Voigtite. 



Bastonite. 



Pholidolite. 

 Roscoelite. 



Margarite. 



Seybertite. 



Braudisite. 



Xantbopbyllite. 



Chloritoid. 



Sisuiondine. 



Salinite. 



Mason ite. 

 Ottrelite. 



Venasquite. 



Phyllite. 



Jefferisite. 



Pelbauiite. 



Yermicnlite. 



Keirite. 

 Culsageeite. 

 Lucasite. 

 Hallite. 



Palnterite. 



Pbiladelpbito. 

 Protovermiculite. 



REPORT OF NATIONAL MUSEUM, 1^*97. 

 (iroup 6.7 — Continued. 

 H.2NaAl:,(SiO0:.. 



(Ll,K),Al,(F,OH),Si:,0,. 



(Li,K):,FoAl:,(F,OH),Si60, 



H3F4(Li,K)7FeAl^Si,oO:,o. 



HK(Mg,Fe),(Al,Fe),(Si04):i 



H,KMg:)Al,(Si04):, 



H8K2(Mg,Fe)(Al,Y),(8iO,):,. 



Group 66. The Brittle Micas. 



HCa(A10);,A10H(Si04).2. 

 H:,(Mg,Ca)5Al,,Si.O,8. 

 Hs(Mg,Ca),,Al,,Si504.,. 

 H8(Mg,Ca)uAl,„Si,0M. 

 HFe(A10H)A10,Si04. 



HFe(A10n)A102Si;,0H. 



Group 67. The Vermiculites. 

 Hi,Mg4(Al,Fe)4.Si50,«. 



H4Mg:,(Al,Fe),Si30n. 

 H7Mg;(Al,Fe)5Si,032. 

 H,4Mg,.,(Al,Fe)4Si9048. 



H.Mg.-,(Al,Fe.),Si:,0,:„ 



Monoclinic. 



Monoclinic. 



Monoclinic. 



Monoclinic. 

 Monoclinic. 



Monoclinic. 



Monoclinic. 



Monoclinic. 

 Monoclinic. 

 Monoclinic. 

 Monoclinic. 

 Monoclinic. 



Monoclinic. 



Monoclinic. 



Monoclinic. 

 Monoclinic. 

 Monoclinic. 



Monoclinic. 



