White V.O. #4

Nepheline syenite 47
Gerstley 13
Dolomite 2
Talc 16
EPK 5
Silica 17
Total 100

Na2O 6.0% Al2O3 14.0% SiO2 61.8%
K2O 2.5% B2O3 4.0% P2O5 0.0%
MgO 6.1% TiO2 0.0%
CaO 5.3% Fe2O3 0.1%

Volatiles:
CO2 1.0%
Other 5.7%

Loss On Ignition: 6.3%

Expansion: 73.2 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

Na2O 0.26 Al2O3 0.37 SiO2 2.77
K2O 0.07 B2O3 0.16 P2O5 0.00
MgO 0.41 TiO2 0.00
CaO 0.26 Fe2O3 0.00

Alumina:Silica ratio is 1.00:7.46
Neutral:Acid ratio is 1.00:5.25
Alk:Neut:Acid ratio is 1.00:0.53:2.78