Giovannelli, F.; Mathieu, C.; Fritsch, K.; Adil, K.; Goutenoire, F.; Habicht, K.; Delorme, F.: Room-temperature synthesis of a new stable (N2H4)WO3 compound: a route for hydrazine trapping. Acta Crystallographica Section B - Structural Science 75 (2019), p. 127-133
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A new (N2H4)WO3 compound has been obtained by mixing WO3 and aqueous hydrazine solution at room temperature for 24 h. The reaction is catalyzed by the presence of lithium. X-ray, synchrotron and neutron diffraction techniques have shown that the material crystallizes in trigonal space group P3221 (No. 154). Chains of distortedWO4 tetrahedra extend along the a axis of the unit cell, linked by a corner-sharing oxygen atom: the N2H4 are in the voids between them. The thermal characterization shows that this new compound is stable up to 220C, greatly beyond the boiling point of N2H4 (114C); thus making it a promising candidate for catalysis or trapping applications.