AN ULTRASENSTITIVE MICROCALORIMETER AND THE HEATS OF FORMATION OF U$sup +4$(aq) AND UOH$sup +3$(aq) (thesis)

Technical Report · Fri Jul 01 04:00:00 EDT 1960

OSTI ID:4066990

Mercer, E E; Argue, G R; Cobble, J W

A sensitive solution microcalorimeter using a thermistoramplifier bridge and automatic recording was constructed and evaluated. The sensitivity is 1 x 10/ sup -//sup 5//sup deg /C; with magnesium, heats of solution in 1 M HCl were measured to plus or minus O-2% for samples of 19.51 mu g. The device was designed for use in determining thermodynamic functions of actinide elements and compounds. Heats of formation of U(IV) in 1 M HCl, U/sup 4//sup +/ (aq), UCl/sub 4/ (C) were redetermined and new values are reported for Np(IV), Np(IH) in 1 M HCl, and Np/sup 4//sup +/ (aq), Np/sup 3//sup +/ (aq). (auth)

• Research Organization: Purdue Univ., Lafayette, Ind.
• NSA Number: NSA-15-020855
• OSTI ID: 4066990
• Report Number(s): TID-12614
• Country of Publication: United States
• Language: English

Related Subjects

ENGINEERING AND EQUIPMENT
URANIUM CHLORIDES