The Allende meteorite is in this group. Type C4 Has well-defined chondrules. Type C5 Water-poor relative to the other Carbonaceous Chondrites with chondrules that are not as well defined. Lodranites Composed of equal amounts of nickel-iron, olivine and pyroxene. Mesosiderites Composed equally of nickel-iron and silicates, primarily hypersthene and plagioclase.
Pallasites Consists of a matrix of nickel-iron with embedded grains of olivine.
It is a differentiated silicate-rich meteorite. Siderites Commonly referred to as Irons. There are 13 groups based on chemistry and 3 groups based on structure. The 13 chemistry-based groups are determined based on the amount of nickel, gallium, germanium and iridium present in the meteorite. IAB Chemistry-based group.