Rb2REGaSi4O12 (RE = Y, Eu, Gd, Tb): Luminescent Mixed-Anion Double Layer Silicates Containing Chains of Edge-Sharing REO7 Pentagonal Bipyramids

Rb2REGaSi4O12 (RE = Y, Eu, Gd, Tb): Luminescent Mixed-Anion Double Layer Silicates Containing Chains of Edge-Sharing REO7 Pentagonal Bipyramids

Four new rare earth gallosilicates, Rb2REGaSi4O12 (RE = Y, Eu, Gd, and Tb, denoted as REGS-1), have been synthesized under high-temperature, high-pressure hydrothermal conditions and characterized by single-crystal X-ray diffraction. They are the first examples of rare earth gallosilicates that cont...

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Veröffentlicht in:Inorganic chemistry 2008-03, Vol.47 (6), p.1910-1912
Hauptverfasser: Lee, Cheng-Shiuan, Liao, Yueh-Chun, Hsu, Jung-Tsung, Wang, Sue-Lein, Lii, Kwang-Hwa
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container_end_page 1912
container_issue 6
container_start_page 1910
container_title Inorganic chemistry
container_volume 47
creator Lee, Cheng-Shiuan
Liao, Yueh-Chun
Hsu, Jung-Tsung
Wang, Sue-Lein
Lii, Kwang-Hwa
description Four new rare earth gallosilicates, Rb2REGaSi4O12 (RE = Y, Eu, Gd, and Tb, denoted as REGS-1), have been synthesized under high-temperature, high-pressure hydrothermal conditions and characterized by single-crystal X-ray diffraction. They are the first examples of rare earth gallosilicates that contain individually occupied tetrahedral Ga3+ and Si4+ centers. The unique structure is formed of two 1D and one 2D substructural units: unbranched achter single chains which are seldom observed in silicates, the PaCl5-type infinite chains formed of edge-sharing REO7 petagonal bipyramids and the unprecedented mixed-anion double layers with the composition [GaSi4O12]. The photoluminescence properties of EuGS-1 and TbGS-1 have been studied. The Y3+ ion in YGS-1 can be partially replaced by Eu3+ and Tb3+ to yield luminescent materials.
doi_str_mv 10.1021/ic7024445
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title Rb2REGaSi4O12 (RE = Y, Eu, Gd, Tb): Luminescent Mixed-Anion Double Layer Silicates Containing Chains of Edge-Sharing REO7 Pentagonal Bipyramids
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