Th e e nth alpy of a sam pl e of lithium te tra Auorober ylla te, Li,BeF4 , of 98.6 pe rce nt purit y was ?,eas u.re d re laLJ ve to 273 K a t eleve n te mpe ratures from 323 to 873 K. Correc tions we re a ppli ed fo r th e Im purI li es and fo r ex te n~lv e premeltin g be low the m e lti~g po int (745 K ). T he e nth alp y an d heat ca pacit y, a nd the e nt ropy a nd GIbbs free-energy fun ctIOn rela LJ ve to th e unde ter min ed valu e of 5,°98 15 ' we re co mputed fro m empiri cal functIO ns of te m pe ratu re derived fro m the data a nd a re ta buhie d from 273 to 900 K.
'Key word s: Drop calorim etry; e nth alp y data; lithium beryllium Auoride; lithium te tra Auorobe ryllate; premeltm g; th e rm odyna mic properties.