Cerium arsenide

Cerium Arsenide.—Hirsch2 obtained an alloy of cerium and arsenic by adding the latter in small amounts to cerium melted under a layer of sodium chloride. The reaction appeared to be exothermic and a soft, somewhat pyrophoric alloy remained, which did not decompose on being kept. 

Fission products that are compatible with the uraninite crystal stmcture—the REE, yttrium, neodymium, and zirconium—were largely retained in the uraninite core, the reactor clays, minor phosphate phases, and uranium and zirconium silicate phases (Gauthier-Lafaye et ai, 1996). Lighter REE—lanthanum, cerium, and praseodymium—were partially lost from the reactor. Einally, molybdenum, technetium, mthe-nium, rhodium, and other metallic elements were retained in the metal/metal oxide inclusions and arsenide/sulfide inclusions in the core, and in the reactor clays (Hidaka et ai, 1993 Jensen and Ewing, 2001). 

---