allendeite, sczro, is an oxide mineral. allendeite was discovered in a small ultrarefractory inclusion within the allende meteorite. this inclusion has been named acm-1. it is one of several scandium rich minerals that have been found in meteorites. allendeite is trigonal, with a calculated density of 4.84 g/cm. the new mineral was found along with hexamolybdenum. these minerals, are believed to demonstrate conditions during the early stages of the solar system, as is the case with many cv3 carbonaceous chondrites such as the allende meteorite. it is named after the allende meteorite that fell in 1969 near pueblito de allende, chihuahua, mexico.