With network structures Inorganic compound formation from

Hydrazine hydrate dissolves many inorganic salts readily most of these salts recrystallize from the solution to form stable solvates or adducts that do not dissolve further. Additionally, the reaction of hydrazine with mineral adds/organic acids also leads to the formation of crystalline solids. These colored compounds are mostly single crystals although polycrystalline products can also be obtained. In metal complexes, hydrazine appears as either singly or doubly protonated cation and plays an important role in forming various hydrogen bond networks in their derivatives. For this reason, it is of interest to determine their crystal structures. 

---