a powdery white oxide of thorium ThO2 used especially as a catalyst and in crucibles and refractories and optical glass

a powdery white oxide of thorium ThO2 used especially as a catalyst and in crucibles and refractories and optical glass
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Answer	Crossword Clue
thoria	a powdery white oxide of thorium ThO2 used especially as a catalyst and in crucibles and refractories and optical glass

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a powdery white oxide of thorium ThO2 used especially as a catalyst and in crucibles and refractories and optical glassCrossword Clue