Liebig is a lunar impact crater that is located to the south-southeast of the crater Mersenius, and west of the Mare Humorum in the southwest part of the Moon. To the southwest of Liebig is the slightly smaller crater de Gasparis.
The rim of Liebig has a low inner wall, with an interior floor that is nearly featureless except for a few tiny craterlets. It is nearly, but not quite circular, with outward bulges to the west and southeast. The small, cup-shaped crater Liebig A lies along the inner wall and part of the interior floor. The infrared spectrum of pure crystalline plagioclase has been identified on the north wall and south rim.
</references>