Jeffrey R. Allwardt, Ph.D.

Affiliations: 
2006 Stanford University, Palo Alto, CA 
Area:
Geochemistry, Geophysics
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"Jeffrey Allwardt"
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Jonathan Stebbins grad student 2006 Stanford
 (Cation ordering at ambient pressure and structural densification mechanisms of high -pressure silicate glasses and melts.)
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Publications

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Liu CW, Alekseyev VY, Allwardt JR, et al. (2009) The diversity of nuclear magnetic resonance spectroscopy Nato Science For Peace and Security Series B: Physics and Biophysics. 65-81
Kelsey KE, Allwardt JR, Stebbins JF. (2008) Ca-Mg mixing in aluminosilicate glasses: An investigation using 17O MAS and 3QMAS and 27Al MAS NMR Journal of Non-Crystalline Solids. 354: 4644-4653
Allwardt JR, Stebbins JF, Terasaki H, et al. (2007) Effect of structural transitions on properties of high-pressure silicate melts:27 Al NMR, glass densities, and melt viscosities American Mineralogist. 92: 1093-1104
Allwardt JR, Stebbins JF, Schmidt BC, et al. (2005) Aluminum coordination and the densification of high-pressure aluminosilicate glasses American Mineralogist. 90: 1218-1222
Allwardt JR, Poe BT, Stebbins JF. (2005) The effect of fictive temperature on Al coordination in high-pressure (10 GPa) sodium aluminosilicate glasses American Mineralogist. 90: 1453-1457
Allwardt JR, Stebbins JF, Schmidt BC, et al. (2005) The effect of composition, compression, and decompression on the structure of high-pressure aluminosilicate glasses. An investigation utilizing 17O and 27Al NMR Advances in High-Pressure Techniques For Geophysical Applications. 211-240
Allwardt JR, Stebbins JF. (2004) Ca-Mg and K-Mg mixing around non-bridging O atoms in silicate glasses: An investigation using 17O MAS and 3QMAS NMR American Mineralogist. 89: 777-784
Du LS, Allwardt JR, Schmidt BC, et al. (2004) Pressure-induced structural changes in a borosilicate glass-forming liquid: Boron coordination, non-bridging oxygens, and network ordering Journal of Non-Crystalline Solids. 337: 196-200
Allwardt JR, Schmidt BC, Stebbins JF. (2004) Structural mechanisms of compression and decompression in high-pressure K2Si4O9 glasses: An investigation utilizing Raman and NMR spectroscopy of glasses and crystalline materials Chemical Geology. 213: 137-151
Allwardt JR, Lee SK, Stebbins JF. (2003) Bonding preferences of non-bridging O atoms: Evidence from 17O MAS and 3QMAS NMR on calcium aluminate and low-silica Ca-aluminosilicate glasses American Mineralogist. 88: 949-954
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