PM7 Magnesium hydride <Mg-H> GR=GPSS19933 Mg 0.00000000 +0 0.0000000 +0 0.0000000 +0 0 0 0 H 1.70000000 +1 0.0000000 +0 0.0000000 +0 1 0 0 H 1.69037071 +1 179.9793818 +1 180.0000000 +0 1 2 0