Neodymium perrhenate is an inorganic compound with the chemical formula Nd(ReO<sub>4</sub>)<sub>3</sub>, which exists in anhydrous and tetrahydrate. It can be obtained by reacting excess neodymium oxide with 240 g/L perrhenic acid solution. In its solution, NdReO<sub>4</sub><sup>2+</sup> and Nd(ReO<sub>4</sub>)<sup>2+</sup> can be observed with stability constants of 16.5 and 23.6, respectively.
Nd<sub>4</sub>Re<sub>6</sub>O<sub>19</sub> can be obtained by reacting neodymium perrhenate and NdRe<sub>2</sub> at high temperature.