Three systems are in vogue, and the confusion arising there-
from is illustrated in this table :
Pottery.
Metallurgy.
Pure
Formula
Mole-
Oxygen
Chemistry
R".
cular
ratio :
and
ratio :
Name.
Name.
Mineralogy.
c3 o
11
3RO . !SiO 2
1 i
silicate
1:1}
sub-silicate
paras ilicate
2RO . !SiO 2
1 |