The new mineral boevskite Pb4(TeO3)2(SO4)(S2O3) was found at the Boevskoe W-Be deposit, Chelyabinsk Oblast, Southern Urals, Russia. It occurs as very rare euhedral grains up to 0.25 mm at the contact of galena and pyrite, as inclusions in galena up to 0.2 mm, and as thin veinlets up to 0.2 × 0.03 mm filling cracks in sphalerite. Other associated minerals include anglesite, cerussite, chalcopyrite, empressite, hessite, ingodite, joséite-B, matildite and pyrrhotite. Boevskite is colourless and transparent with an adamantine lustre. It is brittle, with uneven fracture. No cleavage or parting are observed. The Vickers’ micro-indentation hardness (VHN, 10 g load) is 110 kg/mm2, corresponding to a Mohs’ hardness of 2.5–3. Dcalc. = 6.599 g/cm3. Boevskite is optically biaxial, colourless and nonpleochroic. The mean refractive index calculated using the Gladstone–Dale equation is 2.08. The empirical formula calculated on the basis of 13 O apfu is Pb4.01Te4+2.03S6+1.97S2–0.98O13. Boevskite is orthorhombic, space group Pnma, with a = 9.7764(7), b = 13.3622(10), c = 10.7213(9) Å, V = 1400.57(19) Å3 and Z = 4. The strongest lines of the powder X-ray diffraction pattern [d, Å (I, %) (h k l)] are: 6.683 (65) (0 2 0), 3.355 (44) (1 0 3), 3.344 (52) (0 4 0), 3.289 (60) (2 3 0), 3.230 (100) (1 3 2), 3.144 (92) (2 3 1), 3.120 (51) (3 0 1), 2.787 (50) (0 3 3). The crystal structure of boevskite was refined from single-crystal X-ray diffraction data to R1 = 0.0491 for 1538 reflections with I > 2σ(I). Boevskite has a unique structure formed by Te–Pb–O layers coplanar to the ac plane with thiosulfate groups and SO4 tetrahedra located between them. This is the first mineral having both sulfate and thiosulfate groups as species-defining constituents. It is named after the type locality.