pollucite

From Pollux +‎ -ite, named after Pollux, the twin of Castor, as it is often found associated with castorite (now petalite).

pollucite (plural pollucites)

1. (mineralogy) A colorless transparent mineral of the zeolite family consisting of hydrous cesium aluminum silicate and occurring massive or crystallizing in cubes.

• David Barthelmy (1997–2025) “Pollucite”, in Webmineral Mineralogy Database.
• “pollucite”, in Mindat.org‎^[1], Hudson Institute of Mineralogy, 2000–2025.
• “pollucite”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.