1 18 Water Hexamer Prism Structure 2 1 O 1.762494 0.620064 -1.224927 1 2 3 3 2 H 1.852017 0.583516 -0.261185 2 1 4 3 H 2.512824 1.117656 -1.556673 2 1 5 4 O -1.935627 -1.158001 -0.239573 1 5 6 6 5 H -1.065122 -1.582312 -0.297144 2 4 7 6 H -2.584834 -1.849643 -0.383799 2 4 8 7 O 0.695656 -1.931228 -0.332851 1 8 9 9 8 H 1.068290 -1.434963 -1.071308 2 7 10 9 H 1.040191 -1.490109 0.455703 2 7 11 10 O -1.070730 0.951376 1.499601 1 11 12 12 11 H -1.063287 1.481807 0.688293 2 10 13 12 H -1.571460 0.163819 1.244605 2 10 14 13 O -1.009422 1.442627 -1.222232 1 14 15 15 14 H -0.083959 1.226510 -1.391055 2 13 16 15 H -1.482145 0.602169 -1.204483 2 13 17 16 O 1.484074 0.105281 1.506847 1 17 18 18 17 H 1.958331 0.251326 2.329701 2 16 19 18 H 0.586318 0.452298 1.655744 2 16 20