Electron crystallography of zeolites. 3. Calcined MCM-22 and MCM-49, a case of subtle differences
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| 024 | 7 | 0 | |a 10.1524/zkri.218.9.612.20677 |2 doi |
| 035 | |a (NATIONALLICENCE)gruyter-10.1524/zkri.218.9.612.20677 | ||
| 100 | 1 | |a Dorset |D Douglas L. | |
| 245 | 1 | 0 | |a Electron crystallography of zeolites. 3. Calcined MCM-22 and MCM-49, a case of subtle differences |h [Elektronische Daten] |c [Douglas L. Dorset] |
| 520 | 3 | |a Single crystal electron diffraction intensity data, analyzed by direct methods for determining crystallographic phases, have been employed to seek differences between the crystal structures of calcined MCM-22 and MCM-49. A direct comparison of hk0 intensity data indicates such a difference and this is justified further when the respective structural models are refined. The MCM-22 data agree well with the ITQ-1 Si-framework model, but without adding the extraneous interstitial atoms imposed in an earlier powder X-ray diffraction determination. The T-sites in MCM-49 are placed similarly to the ones in MCM-22 but Fourier refinement indicates the presence of an oxygen site not seen for MCM-22. Also one of the oxygen positions found in MCM-22 is not observed in the MCM-49 potential maps. | |
| 540 | |a © 2003 Oldenbourg Wissenschaftsverlag GmbH | ||
| 690 | 7 | |a Crystallography |2 nationallicence | |
| 690 | 7 | |a Inorganic chemistry |2 nationallicence | |
| 690 | 7 | |a Organic chemistry |2 nationallicence | |
| 773 | 0 | |t Zeitschrift für Kristallographie - Crystalline Materials |d De Gruyter Oldenbourg |g 218/9(2003-09-01), 612-616 |x 2194-4946 |q 218:9<612 |1 2003 |2 218 |o zkri | |
| 856 | 4 | 0 | |u https://doi.org/10.1524/zkri.218.9.612.20677 |q text/html |z Onlinezugriff via DOI |
| 908 | |D 1 |a research article |2 jats | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1524/zkri.218.9.612.20677 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 100 |E 1- |a Dorset |D Douglas L. | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Zeitschrift für Kristallographie - Crystalline Materials |d De Gruyter Oldenbourg |g 218/9(2003-09-01), 612-616 |x 2194-4946 |q 218:9<612 |1 2003 |2 218 |o zkri | ||
| 900 | 7 | |b CC0 |u http://creativecommons.org/publicdomain/zero/1.0 |2 nationallicence | |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-gruyter | ||