ИСТИНА

Ureyite was found in ordinary and carbonaceous chondrites and Ramdorh documented aggregates of chromite with plagioclase in chondrules of the Elenovka L5 chondrite and suggested that some of the chromite objects in ordinary chondrites are pseudomorphs after some older minerals (for example, ureyite). We found and described acicular and tabular crystals with exsolution textures, consisting of regularly oriented aggregates of chromite and lagioclase in pyroxene-olivine porphyritic chondrules of the Berdyansk L6 and Raguli H3.8 ordinary chondrites. The finds of relict grains of jadeite-ureyite clinopyroxene that crystallized from both the chondrule and the matrix melts of the Chelyabinsk LL5 equilibrated chondrite confirm our earlier conclusion about a magmatic nature of chondrites and testify that their parent bodies started to crystallize under significant pressures.