| Reference Type | Journal (article/letter/editorial) |
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| Title | Solid-State Nuclear Magnetic Resonance Spectroscopy on Synthetic Ammonium/Aluminum-Saponites |
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| Journal | Clays and Clay Minerals |
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| Authors | Kloprogge, J. T. | Author |
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| Breukelaar, J. | Author |
| Wilson, A. E. | Author |
| Geus, J. W. | Author |
| Jansen, J. B. H. | Author |
| Year | 1994 (August) | Volume | 42 |
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| Page(s) | 416-420 | Issue | 4 |
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| Publisher | Cambridge University Press (CUP) |
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| URL | |
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| DOI | doi:10.1346/ccmn.1994.0420406Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 146977 | Long-form Identifier | mindat:1:5:146977:0 |
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| GUID | 0 |
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| Full Reference | Kloprogge, J. T.; Breukelaar, J.; Wilson, A. E.; Geus, J. W.; Jansen, J. B. H. (1994) Solid-State Nuclear Magnetic Resonance Spectroscopy on Synthetic Ammonium/Aluminum-Saponites. Clays and Clay Minerals, 42 (4). 416-420 doi:10.1346/ccmn.1994.0420406 |
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| Plain Text | Kloprogge, J. T.; Breukelaar, J.; Wilson, A. E.; Geus, J. W.; Jansen, J. B. H. (1994) Solid-State Nuclear Magnetic Resonance Spectroscopy on Synthetic Ammonium/Aluminum-Saponites. Clays and Clay Minerals, 42 (4). 416-420 doi:10.1346/ccmn.1994.0420406 |
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| In | (1994) Clays and Clay Minerals Vol. 42 (4) Springer Science and Business Media LLC |
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| Abstract/Notes | AbstractAmmonium-saponite is hydrothermally grown at temperatures below 300°C from a gel with an overall composition corresponding to (NH4)0.6Mg3Al0.6Si3.4O10(OH)2. Using 27Al and 29Si solid-state Magic Angle Spinning NMR techniques it is demonstrated that synthetic ammonium-saponites have a rather constant Si/AlIV ratio (≈ 5.5) and an AlIV/AlVI ratio that varies between 1.5 and 3.8. The above ratios are independent of the synthesis temperature, although an increasing amount of Si, N, and, to a lesser extent, Al are incorporated in an amorphous phase with increasing temperature. 27Al MAS-NMR is unable to differentiate between Al at octahedral and Al3+ at interlayer sites. CEC, XRD, and the inability to swell prove the AlVI to be mainly on the interlayer sites. Based on the NH4- exchange capacity, X-ray fluorescence, 27Al and 29Si MAS-NMR, it is possible to calculate a relatively accurate structural formula. |
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