uranoso-uranic

from The Century Dictionary.

• Noting a dark green oxid of uranium, of sp. gr. 7.2 or 7.3, and having the composition of uranyluranate, U₃O₈ or UO₂.2UO₃ or (UO₂)₂UO₄. It is one of the principal constituents of the mineral uraninite or pitchblende, though the proportions of uranium and oxygen vary widely in specimens from different localities.