These, in
AD&D's
Planescape setting, are the planes of:
Earth
Air
Fire
Water
(The
elemental planes)
Ice
Magma
Smoke
Ooze
(The
para-elemental planes)
Positive and
Negative energy
Shadow
Dust
Vacuum
Ash
Salt
Lightning
Radiance
Steam
Mineral
(The
Quasi-elemental planes)