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A series of CuCr_2-<i>x</i>Sn<i>_x</i>S₂.₃Se₁.₇ and CuCr_2-<i>x</i>Sn<i>_x</i>S₁.₇Se₂.₃ (<i>x</i> = 0.4, 0.6, and 1.0) compounds were prepared by solid-state reaction at a high temperature. Single-crystal X-ray diffraction analysis showed that CuCr₁.₁Sn₀.₉S₂.₃Se₁.₇ crystallizes in a spinel-type structure (cubic <i>Fd</i><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mn>3</mn><mo>¯</mo></mover></semantics></math></inline-formula><i>m</i> space group). The others samples were also consistent with a spinel-type structure but through powder X-ray diffraction patterns and Rietveld refinements. The systems studies showed <i>p</i>-type semiconductor behavior with a carrier concentration per volume of approximately ~+10²⁰ cm⁻³. The electrical conductivity, σ, showed tin-content dependence. The conductivity of CuCr_2-<i>x</i>Sn<i>_x</i>S₁.₇Se₂.₃ increased from ~9.0 to ~17.0 S·cm⁻¹ at room temperature (RT) for <i>x</i> = 0.4 and 0.6, respectively, and the magneto-resistance average value determined for CuCr_2-<i>x</i>Sn<i>_x</i>S₂.₃Se₁.₇ and CuCr_2-<i>x</i>Sn<i>_x</i>S₁.₇Se₂.₃ was approximately ~10⁻⁴ Ω (0.566 T, external magnetic field). DFT calculations revealed that the Cr centers concentrated most of the spin density. A smaller spin polarization featuring the opposite spin was observed for S/Se atoms.