| pollucite | <chemical> A colourless transparent mineral, resembling quartz, occurring with castor or castorite on the island of Elba. It is a silicate of alumina and caesia. Synonym: pollux. See: Pollux, and 4th Castor. Source: Websters Dictionary (01 Mar 1998) |
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| pollucite | a rare mineral that is an important source of cesium |
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