METAL + METAL HALIDE SYSTEMS FOR LANTHANUM CERIUM AND PRASEODYMIUM IODIDES

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Discussions Faraday Soc.

OSTI ID:4803832

Corbett, J D; Druding, L F; Burkhard, W J; Lindahl, C B

The metal + metal tri-iodide systems for lanthanum, cerium, and praseodymium are presented in the form of phase diagrams. In contrast to the behavior of the respective chlorides, all three of these systems show the formation of a stable di-iodide, higher melting than the tri-iodide, plus a stoichiometric intermediate phase with an iodine to metal ratio between 2.4 and 2.5. The stability on melting and the melting points decrease from LaI/sub 2/ to PrI/sub 2/. The high conductivities (> 1 x 10/sup 3/ ohm/sup -1/ cm/sup -1/) of the black to bronze di-iodides and the small molar susceptibility (2 x 10/sup -4/ e.m.u.) of LaI/sub 2/ indicate the presence of tripositive metal cations plus metallic'' lattice electrons, M/sup 3+/e(I/sup -/)/sub 2/. This is in contradistinction to the salt-like neodymium di-iodide but similar to the monosulfides and dicarbides of these and neighboring elements. The nature of the solids and their possible conduction behavior in the liquid state are briefly considered. (auth) tones in the system. This method is a way of determining the rate of formation and consumption of an intermediate product in a complex, chain reaction. (TTT)

• Research Organization: Ames Lab., Ames, Iowa
• NSA Number: NSA-16-026985
• OSTI ID: 4803832
• Report Number(s): IS-307
• Journal Information: Discussions Faraday Soc. , Journal Name: Discussions Faraday Soc. Vol. Vol: 32
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CARBIDES
CERIUM IODIDES
CHEMICAL REACTIONS
CHEMISTRY
DIAGRAMS
ELECTRIC CONDUCTIVITY
ELECTRONS
GEOLOGY
HALIDES
IODINE
LANTHANUM IODIDES
LATTICES
LIQUIDS
MAPS
MELTING
MELTING POINTS
METALS
NEODYMIUM IODIDES
PHASE DIAGRAMS
PRASEODYMIUM IODIDES
STABILITY
SULFIDES
SUSCEPTIBILITY