Ŀ
|
wָ
|
|
1.92 g/cm3
|
SiO2
|
68-70
|
|
1.28g/cm3
|
ˮ
|
1.8%
|
|
1.0%
|
AL2O3
|
13-14
|
϶
|
48%
|
Fe2O3
|
1-1.8
|
CaO
|
1.8-2.2
|