The Morphology of Some Hydrothermally Synthesized Li‐Minerals: A‐Zeolite, α‐Eucryptite, β‐Spodumene and β‐Eucryptite

Abstract

Abstract The hydrothermal treatment of glass with the composition 2 LiF, Al 2 O 3 , 3 SiO 2 at 1 kbar in the range of 150 °C to 850 °C gave rise to the formation of A‐zeolite with orthorhombic unit cell with å = 10.31 Å/b̊ = 8.18 Å/c̊ = 5.0 Å (space group Pna2 1 ), α‐eucryptite, trigonal, å = 13.4 Å/bº = 13.4/Å/cº = 9.0 Å (space group R 3 ), β‐spodumene, pseudocubic/tetragonal, å = 7.53 Å/b̊ = 7.53 Å/c̊ = 9.15 Å (space group P4 3 2 1 2), β‐eucryptite, monoclinic, å = 7.75 Å/b̊ = 5.2 Å/c̊ = 11.16 Å (space group P6 2 22). The morphology and development of the mineral phases depend on the temperature of formation.