MARC details
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| fixed length control field |
02312nam a2200289Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20250625160153.0 |
| 040 ## - CATALOGING SOURCE |
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| Transcribing agency |
CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
B-16562 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT |
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| Title |
Dehydration and rehydration of palygorskite and the influence of water on the nanopores |
| 490 0# - SERIES STATEMENT |
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| Volume/sequential designation |
Clays and Clay Minerals, 52(5), p.635-642, 2004 |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
The dehydration and rehydration processes of the clay mineral palygorskite (PFI-1)were studied by textural analysis,thermogravimetric analysis connected with mass spectrometry (TGA-MS), and 29Si and 1H solid-state NMR techniques. The TGA-MS results clearly reveal weight losses at maxima of 70°C, 190°C, 430°C and 860°C. PFI-1 is characterized by a micropore area of 93 m 2/g, corresponding to a micropore volume of 47 mm 3/g. These values are also obtained for the sample heated up to 200°C for 20 h. Further heating at 300°C produces a collapse of the structure, as shown by the almost complete loss of microporosity. The 29Si NMR spectra of palygorskite show two main resonances at -92.0 and -97.5 ppm, attributed to one of the two pairs of equivalent Si nuclei in the basal plane. A minor resonance at -84.3 ppm is attributed to Q2(Si-OH)Si nuclei. The resonance at -92.0 ppm is assigned to the central Si position, while the resonance at -97.5 ppm is assigned to the edge Si sites. It is confirmed by solid-state 29Si and 1H NMR that nearly complete rehydration is achieved by exposing palygorskite samples that have been partially dehydrated at 150°C and 300°C, to D2O or water vapor at room temperature, When the rehydration is accomplished with D2O, the atoms are disordered across all the protons sites. © 2004, The Clay Minerals Society. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
DEHYDRATION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
MASS SPECTROMETRY |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
MICROPOROSITY |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
RESONANCE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
SURFACE PROPERTIES |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
TEMPERATURE CONTROL |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
THERMOGRAVIMETRIC ANALYSIS |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Kuang, W. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Facey, G.A. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Detellier, C.E |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
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| Uniform Resource Identifier |
<a href="https://drive.google.com/file/d/1J35bc6BNtYAoDHeXojbZ__6GT4r5SRp-/view?usp=drivesdk">https://drive.google.com/file/d/1J35bc6BNtYAoDHeXojbZ__6GT4r5SRp-/view?usp=drivesdk</a> |
| Public note |
Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Clasificación local |
| Koha item type |
Documentos solicitados |
