Liquidus temperature (T_L) and primary crystalline phases were determined for simulated Hanford high-level waste glasses with high concentrations of ZrO_2. Previous studies, whether varying components one at a time or statistically designed, contained insufficient number of glasses with zirconium-containing primary phases to support crossproduct terms in second-order mixture models. The data from these studies were augmented by multi-component variations of Al_2O_3, B_2O_3, Li_2O, Na_2O, and ZrO_2 to determine the interactive effects on T_L. Altogether, four second-order mixture models were fitted: two for zircon (ZrSiO_4) primary phase and two for zirconium-containing phases combined.
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