Wairakite

 ( Zeolites ) 

Wairakite is a zeolite mineral with an analcime structure but containing a calcium ion. The chemical composition is Ca₈(Al₁₆Si₃₂O₉₆)•16H₂O. It is named for the location of its discovery in Wairakei, North Island, New Zealand, by Czechoslovak mineralogist Alfred Steiner in 1955. The first finds were in hydrothermally altered Rhyolite , and volcaniclastic rocks. The mineral has since been found in and in geothermal areas. It was most likely first successfully synthesized in a laboratory in 1970.