Direct structural characterization of the changes in the local environment of Mg occurring in the garnet structure as a function of the Ca content are determined by Mg K-edge X-ray absorption fine structure on synthetic samples along the pyrope-grossular join. With increasing Ca content, the short Mg-O2 distance of the dodecahedron slightly decreases, while the long Mg-O4 distance tends to increase, so that the dodecahedron is more distorted in grossular-rich garnets than in end-member pyrope. This quantitative direct description of the changes in the local environment of Mg in the pyrope-grossular solid solution confirms and better defines previous experimental and recent computational results.

Quartieri, S., Boscherini, F., Dalconi, M.c., Iezzi, G., Meneghini, C., Oberti, R. (2008). Magnesium K-edge EXAFS study of bond-length behavior in synthetic pyrope-grossular garnet solid solutions. AMERICAN MINERALOGIST, 93, 495 [10.2138/am.2008.2831].

Magnesium K-edge EXAFS study of bond-length behavior in synthetic pyrope-grossular garnet solid solutions

MENEGHINI, CARLO;
2008-01-01

Abstract

Direct structural characterization of the changes in the local environment of Mg occurring in the garnet structure as a function of the Ca content are determined by Mg K-edge X-ray absorption fine structure on synthetic samples along the pyrope-grossular join. With increasing Ca content, the short Mg-O2 distance of the dodecahedron slightly decreases, while the long Mg-O4 distance tends to increase, so that the dodecahedron is more distorted in grossular-rich garnets than in end-member pyrope. This quantitative direct description of the changes in the local environment of Mg in the pyrope-grossular solid solution confirms and better defines previous experimental and recent computational results.
Quartieri, S., Boscherini, F., Dalconi, M.c., Iezzi, G., Meneghini, C., Oberti, R. (2008). Magnesium K-edge EXAFS study of bond-length behavior in synthetic pyrope-grossular garnet solid solutions. AMERICAN MINERALOGIST, 93, 495 [10.2138/am.2008.2831].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/140672
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