“…Based on crucible tests to date, glasses with 33 wt% NCAW do not form spinel phase, while glasses with 40 to 50 wt% NCAW typically precipitate from 0.5 to 1.0 vol% spinel at 1,050 "C (100 "C below the operating temperature of the melter) (Fini andBailey 1994). At 50 wt% NCAW, baddeleyite (ZrO,) appears in the glass and its concentration increases sharply with waste loading (Hrma and Bailey 1995).…”