PM7 Potassium sulfide <K-S> <><K-S-K> GR=PW91D S 0.00000000 +0 0.0000000 +0 0.0000000 +0 0 0 0 K 2.86432400 +1 0.0000000 +0 0.0000000 +0 1 0 0 K 2.85556624 +1 130.6091810 +1 0.0000000 +0 1 2 0