Permanent magnets are essential for renewable energy technologies such as electric cars and wind turbines. Global demand for magnets is increasing, however, the elements used to make these permanent magnets are toxic to mine. The compound MnBi is a promising alternative to the currently used materials and contains elements that are abundant and non-toxic. I have successfully synthesized a second, similar compound, MnBi2, using high-pressure synthesis. The compound is not stable upon decompression, and so I propose to study it using in situ high-pressure neutron diffraction. This study will provide coincident structural and magnetic information on this new material. These magnetostructural correlations can be used to enhance the magnetic properties of MnBi, or to create new, stable materials with favorable magnetic properties.