X-ray powder diffraction data, unit-cell parameters, and space group for norandrostenedione, C18H24O2, are reported [a = 26.3955(15) Å, b = 8.0476(4) Å, c = 7.3002(3) Å, α = β = γ = 90°, unit-cell volume V = 1550.71 Å3, Z = 4, and space group P212121]. All measured lines were indexed and are consistent with the P212121 space group. No detectable impurity was observed.