Just to be clear -- this story is fictional, it did not happen in real life. It has become a bit of an urban legend because of a video game but does not have a basis in fact.
Interesting! Could you expand?
Obligatory reference to Ice-9 in Kurt Vonnegut's Cat's Cradle: a form of water ice that freezes at a high temperature.
Source for it being fictional? The original 1960 source describes it as extremely nonfictional: https://gwern.net/doc/fiction/science-fiction/1960-analog-oc...