{"title":"The morphology of hydrothermally synthesized gonnardite","authors":"H. Ghobarkar, O. Schäf","doi":"10.1016/S0144-2449(97)00081-X","DOIUrl":null,"url":null,"abstract":"<div><p>The hydrothermal treatment of glasses of the composition 5 Na<sub>2</sub>O : 4 CaO : 9 Al<sub>2</sub>O<sub>3</sub> : 22 SiO<sub>2</sub> at 1 kbar pressure in a temperature range between 80°C and 200°C leads to the formation of the zeolite mineral gonnardite (NAT) with orthorhombic symmetry (<em>a</em> = 13.35 Å, <em>b</em> = 13.35 Å, and <em>c</em> = 6.65 Å). The formation of the mineral phase under these equilibrium conditions is restricted to the temperature interval between 80°C and 150°C.</p></div>","PeriodicalId":23983,"journal":{"name":"Zeolites","volume":"19 4","pages":"Pages 259-261"},"PeriodicalIF":0.0000,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0144-2449(97)00081-X","citationCount":"8","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zeolites","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S014424499700081X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 8
Abstract
The hydrothermal treatment of glasses of the composition 5 Na2O : 4 CaO : 9 Al2O3 : 22 SiO2 at 1 kbar pressure in a temperature range between 80°C and 200°C leads to the formation of the zeolite mineral gonnardite (NAT) with orthorhombic symmetry (a = 13.35 Å, b = 13.35 Å, and c = 6.65 Å). The formation of the mineral phase under these equilibrium conditions is restricted to the temperature interval between 80°C and 150°C.
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