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Hydrothermal Synthesis of Zeolite Crystals Using Natural Scolecite
Author(s) -
Joshi M. S.,
Choudhari A. L.,
Kanitkar R. G.
Publication year - 1986
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170210602
Subject(s) - analcime , nucleation , zeolite , scanning electron microscope , crystal growth , mordenite , materials science , crystallography , diffraction , hydrothermal circulation , chemical engineering , mineralogy , chemistry , optics , catalysis , organic chemistry , composite material , engineering , physics
Abstract Natural scolecite is converted into analcime type zeolite by hydrothemal method at 180 °C at autogeneous pressure for 24 to 160 hours growth runs. Mordenite is detected in the final product. Cube and spheroid crystals of the products are illustrated and described. Crystals synthesized are characterized by X‐ray diffraction, infrared spectroscopy EDAX and scanning electron microscopy. Particle size is estimated as 20–60 microns, induction period for nucleation as 12 hrs, and lattice parameter of cube crystals as 13.70 Å. Mechanism of growth, influence of anions and duration of growth etc. are discussed. It is established that the crystals grow in the system Na 2 OAl 2 O 3 SiO 2 H 2 O.