garronite

garronite

[′ga·rə‚nīt]
(mineralogy)
Na2Ca5 Al12Si20O64·27H2O A zeolite mineral belonging to the phillipsite group; crystallizes in the tetragonal system.
References in periodicals archive ?
(2007): Gobbinsite and garronite assemblage produced by the intrusion and alteration of subvolcanic bodies (External Zone, Betic Codillera).
Garronite Na[Ca.sub.2.5][[Al.sub.6][Si.sub.10]][O.sub.32] x 14[H.sub.2]O
Garronite has been identified by X-ray powder diffraction from locality 86, where it forms a white powder on nepheline crystals.
14 has been shown to be related to garronite (Na[Ca.sub.2.5][[Al.sub.6][Si.sub.10]][O.sub.32]*14[H.sub.2]O) but contains very little calcium and may be a new sodium analog.
Other associated minerals were aegirine, siderite, garronite, and an unknown, white, platy mineral.