When I was much younger than I am now i saw this SF movie from the seventies or early eighties about about 5 scientists and one regular citizen doing an experiment where they are to live inside a great white dome for a set amount of time.

Soon madness develops among the inhabitants of the dome and they start killing each other. This is what I remember of the story. Much later I read a Mickey Mouse version of the story.
(can't find this MM story, I know I had it

If anyone here recognise this, and could provide me with a title, I would be grateful beyond words.

I've been looking for this movie for some time now, maybe you know what I'm looking for.

By the way it's not Biodome from some years back, although it's basically the same idea, and biodome is not the title of this old movie.

Thank's!