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"structure_string": "Sr1 Mg1 Cr1 Fe1\n1.0\n0.000000 3.546230 3.546230\n3.546230 0.000000 3.546230\n3.546230 3.546230 0.000000\nCr Fe Mg Sr\n1 1 1 1\ndirect\n0.500000 0.500000 0.500000 Cr\n0.250001 0.250001 0.250001 Fe\n0.750001 0.750001 0.750001 Mg\n0.000000 0.000000 0.000000 Sr\n",
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