Jerrygibbsite has been found to be dimorphous with sonolite. It is dimorphous with the orthorhombic form massicot. It is dimorphous with the isometric antimony oxide senarmontite. It was thought to be dimorphous with hastite, but this was discredited in 2009. It is dimorphous with tetragonal thorite, and isostructual with monazite. It crystallizes in the monoclinic system and is dimorphous with the orthorhombic mineral rostite. Stolzite crystallizes in the tetragonal crystal system and is dimorphous with the monoclinic form raspite.