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.