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ChemInform Abstract: Syntheses and X-Ray Powder Structures of K2(ZrSi3O9)×H2O and Its Ion-Exchanged Phases with Na and Cs.

✍ Scribed by D. M. POOJARY; A. I. BORTUN; L. N. BORTUN; A. CLEARFIELD

Publisher
John Wiley and Sons
Year
2010
Weight
33 KB
Volume
28
Category
Article
ISSN
0931-7597

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✦ Synopsis

1997 structure structure (solids and liquids) D 2000

40 -004

Syntheses and X-Ray Powder Structures of K2(ZrSi3O9)•H2O and Its Ion-Exchanged Phases with Na and Cs.

-The title compound is prepared hydrothermally from Zr(OPr)4 and SiO2 under mild conditions (180 • C, 5 d, Teflon vessel). The potassium trisilicate crystallizes in space group P212121 with Z = 4. The Zr atom is octahedrally coordinated by the six terminal O atoms of the Si3O9 group. The trisilicate groups are present as linear chain polymers and its linkage by Zr leads to channels and cavities which are occupied by K+. The isotypic sodium analogue of the title compound, Na3ZrSi3O9•H2O, is prepared by treatment with excess 2 M NaCl. Treatment of the potassium and sodium compounds with CsCl solution yields mixed M2-xCsx(ZrSiO9)•H2O (M: K, Na) compounds that retain the crystal structure of the title compound. -(

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✍ Dirk Hinz 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 36 KB 👁 1 views

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