During this study the application of Natrolite zeolite was investigated as a solid acid catalyst for efficient preparation of 5substituted 1H-tetrazole derivatives. Excellent yields of products were obtained with a wide range of substrates. After completion of the reaction, the catalyst was recovered by filtration and reused several times with only a slight decrease of activity observed under t...

background: there are great resources of natural zeolite in iran. zeolite, an inorganic ion-exchanger, may be used as a suitable technical-economical solution for water treatment in many regions of iran. in this study, the characterization of natural zeolite natrolite and the feasibility of removing hardness, cations, and anions were investigated. methods: first, zeolite composition and type we...

The 360-370-Ma-old Lovozero peralkaline massif (NW Russia) is a layered nepheline syenitic–foidolitic pluton. In the rocks of massif, late-stage (auto)metasomatic alterations rock-forming minerals are quite intense. We studied products alteration and sodalite via microtextural, microprobe, spectroscopic methods. found that these extensively replaced by association between natrolite + nordstrand...

in this study, incorporation of iron ion-doped natrolite nanozeolite, multi-wall carbon nanotubes into chitosan-coated glassy carbon electrode for the simultaneous determination of ascorbic acid, epinephrine, uric acid and tyrosine is studied. the results show that the combination of multi-wall carbon nanotubes and iron ion-doped natrolite zeolite causes a dramatic enhancement in the sensitivit...

S COLECITE (Ca(A12Si3Oa0).3H20) is a naturally occurring zeolite closely related to natrolite and mesolite. Hey and Bannister (I936) examined scolecite in detail and derived from Laue and rotation photographs a nearly orthogonal monoclinic cell with parameters a I8"48 A, b I8"95 A, c 6"54 A,/3 9 ~ 3~'. They noted that scolecite belonged to class m because of its pyroand piezoelectric properties...