6 5 8 



CROSS, ID DINGS, PIRSSON, WASHINGTON 



TABLE V. 



VESUVOSE-ALBANOSE (LEUCITITE). CAPO DI BOVE, ITALY. 



A.J. S., Vol. IX (1900), p. 56. 



1 Mol. of akermanite = y = — = i"X. 

 3 



FORMULA. 



K„O.Al„0 3 . 4 SiOo 



Na„O.AU0 3 2SiO"„ 



CaO.Al.O3.2SiO"- 



CaO.Si0 2 - 

 |MgO.Si0 2 - 

 'FeO.Si0 2 - 



2MgO.Si0 2 - 



2FeO.SiO„ 



4 Ca0. 3 Si0 2 - 



FeO.Fe„O a 



FeO.TiO, 



MOL. WT. 



94 X 436 = leucite = 



35 X 284 = nephelite = 



39 X 278 = anorthite = 



S7Xn6 \ 



43 X 100 > = diopside = 



14 X 132 ) 



go X 70 " 



NORM. 

 40.98 



9-94 



10.84 



L = 50.92 

 F = 10.84 



Sal 61.76 



12.76 P = 12.76 



30 X 102 ' 



23 X 4°4 



26 X 232 



S X 152 



= olivine = 



= akermanite = 

 == magnetite = 

 = ilmenite ; 



H,0 



9.36 



9.29 ) 



6.03 ) 



• 76 5 



•45 



= 18.65 ^ Fern 38.20 



Sal 

 Fem 



61.76 

 38.20 



<!>! f= 



Dosalane- 

 salfemane. 



ORDER 6. 

 10.84 . 3 ^ 1 

 5°-9 2 5 7 



Campanare- 

 bohemare. 



rang 2. 

 K 2 0'+Na.,0' 129 



CaO 



39 13 



Vesuva.se- 

 albanase. 



SUBRANG 2. 



KoO' _ 94 ^7^.5 

 Na„0 35^1^3 



Vesuvose 

 albanose. 



The janeirose (pseudo-leucite-sodalite-tinguaite), Table VI, 

 illustrates the method of calculating leucite and orthoclase, 

 as well as sodalite and noselite. After allotting Si0 2 to nephelite, 

 acmite, diopside, and olivine, the remainder of SiO s is 0.546 mol. 



