固体高分解能 NMR による天然ゼオライトと粘土鉱物のキャラクタリゼーション

概要

論文の詳細を見る
The use of the MAS techniques enables ^<29>Si-NMR to be obtained with the resolution of resonances from silicon atoms in chemically different microenvironments, namely different degrees of Si (nAl) coordinations in frameworks or layered structures and Si-O-Si bonding angles in silicate networks. On the other hand the use of the ^<27>Al-MASNMR techniques can result in the resolution of distinction of the Al (-O) coordination states. In this paper, the following items are discussed : (1) The relation between ^<29>Si-chemical shifts and Si-Al micro-ordering[Si (nAl) configurations]for zeolites. (2) Si/Al ratios of zeolitic frameworks. (3) Information of the Al (-O) coordination states obtained from ^<27>Al-MASNMR and Loewenstein's rule for aluminosilicate networks. (4) The applications of MASNMR to various natural zeolites ; the comparison of the Si/Al ratios of the framework structure with the bulk.The problems of identification "clinoptilolite" and "heulandite" (5) The ^<29>Si-and ^<27>Al-MASNMR investigations for various phyllosilicates: kaolinites (1:1 dioctahedral), antigorite and chrysotile (1:1 trioctahedral), pyrophyllite, montmorillonite and sericite (2:1 dioctahedral), and talc, vermiculite and chlorite (2:1 trioctahedral). (6) The unique ^<29>Si-and ^<27>Al-MASNMR results of sepiolite and attapulgite (palygorskite) with unusual phyllosilicate structures. (7) Detection of the microstructures by MASNMR for allophane, amorphous clay minerals.
日本粘土学会の論文
1986-08-08

固体高分解能 NMR による天然ゼオライトと粘土鉱物のキャラクタリゼーション

スポンサーリンク

概要

著者

関連論文

スポンサーリンク