<chemistry> A metallic element found in certain rare minerals, as thorite, pyrochlore, monazite, etc, and isolated as an infusible gray metallic powder which burns in the air and forms thoria; formerly called also thorinum. Symbol Th. Atomic weight 232.0.

Origin: NL. See Thorite.

(01 Mar 1998)

thoradelphus, thorax, thoria, thoric, thorite < Prev | Next > thorium compounds, thorium dioxide

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