Possible evidence of the nickel nitrate salt Ni(NO3)2 . 5.5 H2O

In the present work we have focus our care on the controversial intermediate salt: Ni(NO 3 ) 2 . 5.5 H 2 O. To prepare this phase, we have carried out, in the range 60-80°C, a controlled evaporation of a solution of nickel nitrate, hexahydrate resulting from the melting of a 100g Ni(NO 3 ) 2 .6H 2 O batch sample in an isothermal pilot reactor. The proof of its existence is given, for the first time, by powder x-ray diffraction data.