The crystal structure of svabite, ideally Ca₅(AsO₄)₃F, was studied using a specimen from the Jakobsberg mine, Värmland, Sweden, by means of single-crystal X‑ray diffraction data. The structure was refined to R₁ = 0.032 on the basis of 928 unique reflections with F_o > 4s(F_o) in the P6₃/m space group, with unit-cell parameters a = 9.7268(5), c = 6.9820(4) Å, V = 572.07(5) Å3. The chemical composition of the sample, determined by electron-microprobe analysis, is (in wt%, average of 10 spot analyses): SO₃ 0.49, P₂O₅ 0.21, V₂O₅ 0.04, As₂O₅ 51.21, SiO₂ 0.19, CaO 39.31, MnO 0.48, SrO 0.03, PbO 5.19, Na₂O 0.13, F 2.12, Cl 0.08, H₂O_calc 0.33, O (≡ F+Cl) –0.91, total 98.90. On the basis of 13 anions per formula unit, the empirical formula corresponds to (Ca_4.66Pb_0.16Mn_0.04Na_0.03)_Σ4.89(As_2.96S_0.04Si_0.02P_0.02)_Σ3.04O₁₂[F_0.74(OH)_0.24Cl_0.01]. Svabite is topologically similar to the other members of the apatite supergroup: columns of face-sharing M1 polyhedra running along c are connected through TO₄ tetrahedra with channels hosting M2 cations and X anions. The crystal structure of synthetic Ca₅(AsO₄)₃F was previously reported as triclinic. On the contrary, the present refinement of the crystal structure of svabite shows no deviations from the hexagonal symmetry. An accurate knowledge of the atomic arrangement of this apatite-remediation mineral represents an improvement in our understanding of minerals able to sequester and stabilize heavy metals such as arsenic in polluted areas.