?
SiO2 – 99.0 % , 550 - 650 2/
,%
3.0 - 5.0
4.6
( )%
99.0 %
99.92 %
,
-------
15.40
---------
1.45
/
----------
350
Fe,%
0,3
0.03
, %
0.1
, /100 .
137
pH
( 5% )
5,0 7.0
6.0