Nuclear Magnetic Resonance Spectroscopy of Silicate Melts   and Glasses
{'Code': '06030107', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'Felicia Fauntleroy', 'PO_EMAI': None, 'PO_PHON': None}
This project represents a continuation of research previously                   supported by NSF grant EAR 85-07925, involving studies of the                   structure and atomic motions in molten and glassy silicates using               nuclear magnetic resonance (NMR) spectroscopy.  A previously                    developed high-temperature NMR probe and furnace system will be                 used to continue studies of NMR lineshapes and relaxation times                 of Si-29 and Na-23 in alkali silicate and aluminosilicate melts,                extending the studies to include wider composition and                          temperature ranges.  In addition, O-17 measurements will be                     initiated, and the resulting observations of atomic-scale                       processes will be related to known thermodynamic properties of                  the melts.  Work will also be continued on glasses and the glass                transition, emphasizing the effects of quench rate (and therefore               transition temperature) on structure and defects.  Finally, the                 clustering of protonated species in hydrous glasses will be                     studied using multiple quantum 1-H NMR techniques.  The results                 of these studies will improve our understanding of the                          fundamental thermodynamic and transport properties of important                 silicate melts and glasses.
{'FirstName': 'Jonathan', 'LastName': 'Stebbins', 'PI_MID_INIT': 'F', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Jonathan F Stebbins', 'EmailAddress': 'stebbins@stanford.edu', 'NSF_ID': '000430301', 'StartDate': '09/01/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Stanford University', 'CityName': 'STANFORD', 'ZipCode': '943052004', 'PhoneNumber': '6507232300', 'StreetAddress': '450 JANE STANFORD WAY', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'California', 'StateCode': 'CA', 'CONGRESSDISTRICT': '16', 'CONGRESS_DISTRICT_ORG': 'CA16', 'ORG_UEI_NUM': 'HJD6G4D6TJY5', 'ORG_LGL_BUS_NAME': 'THE LELAND STANFORD JUNIOR UNIVERSITY', 'ORG_PRNT_UEI_NUM': None}
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[{'Code': '1573', 'Text': 'Petrology and Geochemistry'}, {'Code': '1772', 'Text': 'CERAMICS & ELECTRONIC MATERIAL'}]
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