THERMAL-PROPERTIES OF NEODYMIUM HYDRAZIDOCARBONATE TRIHYDRATE

The thermal properties of lanthanide hydrazidocarbonates were studied in an inert atmosphere by selecting neodymium hydrazidocarbonate trihy drate, Nd(N2H3COO)3. 3H2O, as a model substance for the essentially si milar thermal behaviour of hydrazidocarbonates of all the lanthanides except promethium. Neodymium hydrazidocarbonate trihydrate cannot be c onverted into a pure anhydrous compound by heat treatment because the dehydration of the sample is accompanied by partial decomposition of t he other part of the molecule, i.e. the hydrazidocarbonato groups. The decomposition finally proceeds through some intermediates to a mixtur e of neodymium oxide and amorphous carbon, and finally at 1450-degrees -C, to neodymium oxide carbide, Nd2C2O2.