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Hydrothermal Synthesis and Characterization of VSZ‐3 Zeolite Crystals
Author(s) -
Joshi M. S.,
Mohan Rao P.,
Choudhari A. L.,
Kanitar Ravindra
Publication year - 1982
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.2170170804
Subject(s) - zeolite , analcime , hydrothermal circulation , hydrothermal synthesis , characterization (materials science) , crystallography , materials science , mineralogy , crystal growth , chemical composition , chemical engineering , chemistry , nanotechnology , organic chemistry , catalysis , engineering
Zeolite crystals (named here VSZ‐3) synthesized at 350°C by hydrothermal method are illustrated and described. These crystals are shown to be analcime type zeolites. It is established that their size is the largest among the zeolite crystals ever reported, and are stable upto 1000°C. The VSZ‐3 crystals are prismatic pyramidal and needle‐like. They are characterized by X‐rays, SEM, TGA, DTA and IR. Their chemical composition is shown to be 5.95 SiO 2 ṁ Al 2 O 3 ṁ 0.91 Na 2 O ṁ 0.17 H 2 O. Mechanism of growth of these crystals is explained.