<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Dark red needles of [Fe(H<sub>2</sub>dach)<sub>2</sub>]<sub>3</sub> [V<sub>15</sub>Sb<sub>6</sub>O<sub>42</sub>(H<sub>2</sub>O)] ·8H<sub>2</sub>O (I) are obtained under solvothermal conditions form a mixture of FeSO<sub>4</sub>, NH<sub>4</sub>VO<sub>3</sub>, Sb<sub>2</sub>O<sub>3</sub>, H<sub>2</sub>O, and trans‐1, 2‐diaminocyclohexane (dach), the latter acting as ligand, solvent, and reducing agent (sealed glass tube, 160 °C, 7 d).</p> </abstract>