Hehe, awesome stuff. Definitely appealed to my chemistry geek. I need to ask my professors for more info on similar gases now :D Sadly we couldn't float much more on it than a foil boat as it's just not dense enough. As for the comment of seeing a tank of it, you've got a tank maybe 0.5m x 0.3 x 0.3. Volume wise, that's not even approaching a mole of the substance, let alone anything that could cause environmental damage. Sure if every home had a small tinfoil boat bobbing in a tank of SF6, maybe we could worry. Until then, that car parked outside is a bigger danger to the environment.
Sadly we couldn't float much more on it than a foil boat as it's just not dense enough. As for the comment of seeing a tank of it, you've got a tank maybe 0.5m x 0.3 x 0.3. Volume wise, that's not even approaching a mole of the substance, let alone anything that could cause environmental damage. Sure if every home had a small tinfoil boat bobbing in a tank of SF6, maybe we could worry. Until then, that car parked outside is a bigger danger to the environment.