  24
 units: A
      Si                   3.875308    2.220272    0.149587
      Si                   0.000000    2.208814    0.181894
      Si                  -3.875308    2.220272    0.149587
      Si                   5.750821    1.106133   -0.225559
      Si                   1.925380    1.120402   -0.222809
      Si                  -1.925380    1.120402   -0.222809
      Si                   5.750821   -1.106133    0.225559
      Si                   1.925380   -1.120402    0.222809
      Si                  -1.925380   -1.120402    0.222809
      Si                   3.875308   -2.220272   -0.149587
      Si                  -0.000000   -2.208814   -0.181894
      H                    3.869673   -3.680110    0.161551
      H                   -0.000000   -3.665801    0.149215
      Si                  -3.875308   -2.220272   -0.149587
      H                   -3.869673   -3.680110    0.161551
      Si                  -5.750821   -1.106133    0.225559
      H                   -7.045841   -1.824353    0.041623
      Si                  -5.750821    1.106133   -0.225559
      H                    7.045841    1.824353   -0.041623
      H                    7.045841   -1.824353    0.041623
      H                   -7.045841    1.824353   -0.041623
      H                    3.869673    3.680110   -0.161551
      H                    0.000000    3.665801   -0.149215
      H                   -3.869673    3.680110   -0.161551
