A magnesium silicate mineral (MgSiO₃) in an orthorhombic perovskite structure that, with ferropericlase, is the predominant material in the Earth’s lower mantle and, therefore, the most abundant solid phase in the Earth’s interior, accounting for 38% of the Earth’s volume. Bridgmanite was discovered in the Tenham L6 chondrite and the name approved in 2014. It is named for Percy W. Bridgman.