| Autor: |
Merli, Marcello, Oberti, Roberta, Caucia, Franca, Ungaretti, Luciano |
| Zdroj: |
American Mineralogist (De Gruyter); January 2001, Vol. 86 Issue: 1-2 p55-65, 11p |
| Abstrakt: |
Leverage analysis enables identification of reflections with the greatest influence on the estimate of each refined variable, and thus may be an important tool to improve standard structure-refinement procedures, especially in the case of minerals with complex composition. In this work, leverage analysis was used to investigate in detail the influence of each reflection in high-resolution X-ray diffraction data collected from olivine, a mineral often used to model order-disorder processes and to calculate temperatures of closure and cooling rates of host rocks. Particular attention was paid to the estimate of the scattering power at the cation sites, that are crucial for the above studies. Various procedures for data correction and refinement were also investigated, and the different possible choices were compared to choose the strategy that provides the best results. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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