CATION SITE ENERGIES IN DEHYDRATED KFL-TYPE ZEOLITES - D-NAKFL, D-NAHKFL, AND D-KKFL

被引：21

作者：

LIEVENS, JL ^{[1
]}

VERDUIJN, JP ^{[1
]}

MORTIER, WJ ^{[1
]}

机构：

[1] EXXON CHEM HOLLAND BCT,ROTTERDAM,NETHERLANDS

来源：

ZEOLITES | 1992年 / 12卷 / 06期

关键词：

CATION LOCATION; KFL; XRD;

D O I：

10.1016/0144-2449(92)90117-8

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 Na- and K-ion distribution in dehydrated KFI-type zeolites (Si/Al = 3.3) was used as a probe for the computation of the site-energy differences at the hexagonal prism, the puckered (Na and K), and flat eight-rings (K only) using an (exact) statistical thermodynamical model and an X-ray powder diffraction study (Rietveld refinement). The site stability sequence was found to be (center of the hexagonal prism) < (adjacent six-rings) < (flat eight-ring, K only) < (puckered eight-ring). The lower energetic stability of the site inside the hexagonal prism vs. the adjacent six-ring sites is consistent with the situation in FAU and EMT (for Si/Al > 3).

引用

页码：690 / 697

页数：8

共 20 条

[1] THE HYDROTHERMAL CHEMISTRY OF SILICATES .3. REACTIONS OF ANALCITE AND LEUCITE [J].