Kim, SH Kim, SD Kim, YC Kim, CS Hong, SB 2024-01-21T13:03:50Z 2024-01-21T13:03:50Z 2021-09-05 2001-01 1387-1811 https://pubs.kist.re.kr/handle/201004/140816 Ga-substituted merlinoite (MER)-type zeolites are hydrothermally synthesized using aluminosilicate MER crystals as seeds under wholly inorganic conditions. The presence of Ga in tetrahedral positions is evidenced by powder X-ray diffraction, Si-29 and Ga-71 MAS NMR, and IR spectroscopies. The bulk Si/(Ga + Al) ratio in the framework determined by elemental analysis is in the range 1.9-3.0, depending on the initial Si/Ga ratio of the synthesis mixture. An attempt to fully substitute framework Al by Ga was not successful: a gallosilicate with GIS topology, denoted TNU-2, is produced when aluminosilicate MER seed crystals are not added to the synthesis mixture. This clearly shows that the structure-directing ability of Ga is different from that of Al in the synthesis conditions used here. (C) 2001 Elsevier Science B.V. All rights reserved. English ELSEVIER GALLIUM Synthesis and characterization of Ga-substituted MER-type zeolites Article 10.1016/S1387-1811(00)00315-2 1 MICROPOROUS AND MESOPOROUS MATERIALS, v.42, no.1, pp.121 - 129 MICROPOROUS AND MESOPOROUS MATERIALS 42 1 121 129 scie scopus 000166242700012 2-s2.0-0034745707 Chemistry, Applied Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article GALLIUM merlinoite Ga substitution synthesis characterization structure-directing effects of Ga