Ion-exchange in natural zeolite stilbite and significance in defluoridation ability
作者: Luis Gómez-HortigüelaAna B. PinarJoaquín Pérez-ParienteTaju SaniYonas ChebudeIsabel Díaz
作者单位: 1Instituto de Catálisis y Petroleoquímica, CSIC, C/ Marie Curie 2, 28049 Cantoblanco, Madrid, Spain
2Laboratory of Crystallography, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
3Chemistry Department, Addis Ababa University, Addis Ababa, Ethiopia
刊名: Microporous and Mesoporous Materials, 2014, Vol.193 , pp.93-102
来源数据库: Elsevier Journal
DOI: 10.1016/j.micromeso.2014.03.014
关键词: StilbiteNatural zeolitesRietveld refinementExtraframework cationsDefluoridation
英文摘要: Abstract(#br)A preliminary inspection of natural zeolites samples in the north east of Ethiopia showed a large deposit of highly pure stilbite (hereafter called |CaNa|-STI). Rietveld refinement of synchrotron powder diffraction data ( C 2/ m , a =13.62(1)Å, b =18.2563(1)Å, c =11.28(1)Å, β =127.8(2)°) has shown that both Ca 2+ and Na + ions reside at the intersection of the ten- and eight-ring channels, and are completely surrounded by H 2 O molecules that make close contacts with the zeolite framework. Therefore, no coordination of the cations with framework oxygen atoms is observed....
全文获取路径: Elsevier  (合作)
影响因子:3.365 (2012)

  • defluoridation 去氟化
  • stilbite 束沸石
  • natural 自然的
  • exchange 交换
  • ability 能力
  • significance 显著性
  • refinement 精制