| Autor: |
Bleam, William, Dec, Stephen, Frye, James |
| Zdroj: |
Physics & Chemistry of Minerals; Nov1989, Vol. 16 Issue 8, p817-820, 4p |
| Abstrakt: |
This is a report of Al magic-angle spinning, nuclear magnetic resonance spectroscopy of 5- and 6-coordinate aluminum in the aluminophosphate minerals augelite and senegalite. We have determined the quadrupolar coupling constants, asymmetry parameters and chemical shifts corrected for quadrupolar-induced shift for both aluminum coordination sites in each mineral. The quadrupolar coupling constants are significantly less in senegalite than in augelite. Structural analysis (viz., longitudinal- and shear-strain of the aluminum coordination polyhedra; coefficient-of-variation for both Al-O bond lengths and
|
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink