pollucite
noun
a colourless rare mineral consisting of a hydrated caesium aluminium silicate, often containing some rubidium. It occurs in coarse granite, esp in Manitoba, and is an important source of caesium. Formula: CsAlSi 2 O 6 . 1/2 H 2 O
Word Origin for pollucite
C19: from Latin polluc-, stem of Pollux + -ite 1; originally called pollux, alluding to Castor and Pollux, since it was associated with another mineral called castor or castorite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012