8 Lattice=" 5.41852 0 0 0.038783 5.47951 0 0.00323821 0.0198894 5.39896 " Si -0.0136142 -0.0297439 -0.141562 Si 1.34075 1.30471 1.3715 Si -0.0280615 2.73239 2.73273 Si 1.33689 4.08129 3.93514 Si 2.80172 0.157681 2.72105 Si 4.07194 1.39009 4.01929 Si 2.65272 2.79754 0.0144035 Si 4.02421 4.07244 1.32124