SYNTHESIS AND CHARACTERIZATION OF SELENATE AND SULFATE-SELENATE ETTRINGITE STRUCTURE PHASES

被引：36
作者：
HASSETT, DJ
MCCARTHY, GJ
KUMARATHASAN, P
PFLUGHOEFTHASSETT, D
机构：
[1] N DAKOTA STATE UNIV,DEPT CHEM,FARGO,ND 58105
[2] N DAKOTA STATE UNIV,DEPT GEOL,FARGO,ND 58105
来源：
MATERIALS RESEARCH BULLETIN | 1990年 / 25卷 / 11期
关键词：
D O I：
10.1016/0025-5408(90)90216-O
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Crystalline ettringite structure phases with selenate substituted partially and completely for sulfate have been synthesized and characterized by chemical analysis, XRD, SEM and FTIR spectrometry. There is complete miscibility between sulfate and selenate ettringite. According to a proposed structural formula model, the phases were deficient in sulfate/selenate, and all but the selenate end member were slightly deficient in aluminum, compared to the nominal stoichiometry Ca6Al2(XO4)3(OH)12·26H2O, X = S, Se. Solid solution with a hydroxide ettringite is proposed. Selenate-substituted ettringite could be a host phase for selenium in solid waste forms, especially those based on aluminosulfate cements. © 1990.
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页码：1347 / 1354
页数：8
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