pollucite
/ (ˈpɒljʊˌsaɪt, pəˈluːˌsaɪt) /
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