Sr

Ca

Ba

Mg

Fe

Si

Na

99.0

0.3

0.3

0.1

0.05

0.02

0.1

High-grade

First-grade

SrF2

97.0

96.0

BaF2(as Ba)

0.5

2.0

Cl

0.02

0.04

S

0.1

0.1

P

0.01

0.01

Hg

0.001

0.001

CO2

0.4

0.4