چكيده لاتين :
Zeolits are groups of aluminniuosilicate minerals of crystallized hydrated with small pores containing
interchangeable cations from alkaline and alkaline earth metals with tridimentional lattice. these minerals are
formed tetrahedral units AL04 and –SiO4 which are joined with oxygen atoms, that this structure produces
channels and pores for passing water or exchangeable cat ions. formation of zeolites are in both natural and
artificial methods: in natural method, it is formed at Salter alkaline lakes, alteration toufha,open system of
underground water, alkaline medium soils and deep sediments of sea. In artificial method, zeolite formation
has been done in two cases of kaolin alteration or solving H2O2 and AL2O3 at NaOH hot solution and
mixing with sodium silicate ( Na2SiO3 ) .so far, more than 85 types of natural zeolite and 100 types of
artificial zeolites have been presented to market that kelinoptilolite, analism, lamonite, flipside, murdenite
and hulandite are the most abundant natural zeolites which there are a large resources of those in America,
Bulgaria, Italy, Russia, geographically.in Iran this mineral substance has also been recognized that the most
favorable regions for producing are zeolite resources like: the south of Damavand, around Varamin, in the
southern part of talhe mountain and Semnan desert.
From decade of 1970 that zeolite discussion spent experimental stages at the United state , until now that
use of zeolite in agricultural industry is known and applied at many countries, even Armenia and Turkey, In
Iran except limited use, it is approximately unknown and a few have proceeded to that. with attention to the
abundance of mines and Iran zeolite resources and its availability, it is the time with doing more research
designs in different fields, science and technology, make native applying of this magical material and step
toward stable agriculture.
