Preparation and Structure of Double Complex Compounds [La(HMPA)4(NO3)2][Cr(NH3)2(NCS)4]

This paper presents the results of chemical analysis, IR- spectroscopic analysis, thermal gravitational analysis, X-ray phase analysis, and X-ray structural analysis, conducted to determine the composition, structure and properties of the double complex salts - tetra(isotiocyanato)diaminechromates(III) of complex lanthanon(III) of ceric group with hexamethylphosphorotriamide (HMPA) and nitrate-groups as ligands.