THE CRYSTAL-STRUCTURE OF ZEOLITE LINDE Q - A PROPOSAL BASED ON POWDER X-RAY-DIFFRACTION AND AL-27 AND SI-29 MAS NMR-SPECTROSCOPY

被引：16

作者：

ANDRIES, KJ ^{[1
]}

BOSMANS, HJ ^{[1
]}

GROBET, PJ ^{[1
]}

机构：

[1] KATHOLIEKE UNIV LEUVEN,FAC LANDBOUWWETENSCHAPPEN,ANALYT & MINERALE SCHEIKUNDE LAB,B-3001 HEVERLEE,BELGIUM

来源：

ZEOLITES | 1991年 / 11卷 / 02期

关键词：

LINDE-Q; CRYSTAL STRUCTURE; MAS NMR SPECTROSCOPY;

D O I：

10.1016/0144-2449(91)80405-O

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The BPH topology is proposed for the tetrahedral framework of the synthetic zeolite Linde Q (hexagonal; a = 13.501(9) angstrom; c = 13.403(19) angstrom; P321; unit cell composition (104-degrees-C); 7 K2O.7 Al2O3.14 SiO2.21.7 H2O). The one-dimensional 12-ring channel along [001] intersects with a two-dimensional intersecting channel system parallel to (001) with eight-ring apertures. The "sheetlike" structure accounts for the low framework density and the low thermal stability. The positions of four extraframework cation sites and four water molecules is also proposed. This structure type with completely ordered Si, Al distribution is consistent with Si-29 MAS n.m.r. spectroscopy and with its chemical and physical properties.

引用

页码：124 / 131

页数：8