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We report both experimental and theoretical investigations of the physical properties of Ba2Mn2Sb2O single crystals. This material exhibits a hexagonal structure with lattice constants a=4.7029(15) and c=19.9401(27) , as obtained from powder x-ray diffraction measurements, and in agreement with structural optimization through density functional theory (DFT) calculations. The magnetic susceptibility and specific heat show anomalies at TN=60 K, consistent with antiferromagnetic ordering. However, the magnitude of TN is significantly smaller than the Curie-Weiss temperature (ΘCW 560 K), suggesting a magnetic system of reduced dimensionality. The temperature dependence of both the in-plane and out-of-plane resistivity changes from activated at TTx∼200 K to logarithmic at T

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Physical Review B - Condensed Matter and Materials Physics