Lithium in saturated iron Line Blend

Both the left member, and right member of this line blend have empirical formula with:

alumina = .35

slilica ~2.75

Fe2O3 ~.18

MgO ~.3

The left member has total alkali metal = .48 with Li2O = .17 and CaO = .2

The right member has total alkali metal = .52 with Li2O =.42 and CaO = .19

This is a test of the effect of the relative proportion of the various alkaline metals.

This is fired to cone 6 in an electric kiln. All the tiles were fired in the same kiln, on the same shelf.