Neutopia (planet)

The rock alien homeworld, briefly dubbed "Neutopia" is a mineral world, apparently lifeless except for the rock aliens.

The planet is covered in minerals and rivers of floating mercury. The temperature is at times pleasant, but when reaching the top temperature the mercury rivers start boiling and it is impossible for organic life to survive on the general surface. After the crew and passengers of Plan Am are stripped of their genders, they get along so well that they call the planet their "Neutopia".