THE HEATS OF FUSION OF SOME RARE EARTH METAL HALIDES

Journal Article · Fri Nov 01 04:00:00 EST 1963 · Journal of Physical Chemistry (U.S.)

DOI:https://doi.org/10.1021/j100805a511· OSTI ID:4146758

Dworkin, A S; Bredig, M A

Values for the heat and entropy of tusion, heat content, and heat capacity of La, Pr, Nd, and Gd bromides and Gd, Ho, and Er chlorides are given. LaBr/sub 3/, PrBr/sub 3/, and GdCl/sub 3/ and NdBr/sub 3/ have similar entropies of fusion to those found for the chlorides of La, Pr, and Nd and the iodides of Ce and Pr. On the other handd, Ho and Er chlorides and GdBr/sub 3/ have unusually low entropies of fusion. The low entropy of fusion of HoCl/sub 3/, ErCl/sub 3/, and GdBr/sub 3/, in which the ionic radius r/sub M//sup 3+/ is greater than r/sub Al//sup 3+/, is in agreement with the fac t that their melts are ionic like the crystals and like the melts of the lower rare earth trichlorides, such as LaCl/sub 3/. (P.C.H.)

• Research Organization: Oak Ridge National Lab., Tenn.
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-001643
• OSTI ID: 4146758
• Journal Information: Journal of Physical Chemistry (U.S.), Journal Name: Journal of Physical Chemistry (U.S.) Vol. Vol: 67; ISSN JPCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
ERBIUM CHLORIDES
FUSION HEAT
GADOLINIUM BROMIDES
GADOLINIUM CHLORIDES
HOLMIUM CHLORIDES
LANTHANUM BROMIDES
MELTING
PRASEODYMIUM BROMIDES
SPECIFIC HEAT
THERMODYNAMICS