<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>K<sub>2</sub>V<sub>6</sub>O<sub>16</sub>·1.5H<sub>2</sub>O superlong nanobelts are hydrothermally synthesized from aqueous solutions of K<sub>3</sub>VO<sub>4</sub> and HCl (autoclave, pH 3, 200 °C, 24 h) and characterized by powder XRD, SEM, TEM, XPS, and magnetic and electrical measurements.</p> </abstract>