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Synthesis and infrared spectroscopy of amphiboles along the tremolite-pargasite join.

Giancarlo Della Ventura 1 Franck C. Hawthorne 2 Jean-Louis Robert 3 Gianluca Iezzi 3, 4
1 Dipartimento di Scienze Geologiche [Roma TRE]
2 DEPARTMENT OF GEOLOGICAL SCIENCES - Department of Geological Sciences
3 ISTO - Institut des Sciences de la Terre d'Orléans
4 BGI - Bayerisches Geoinstitut
Abstract : Amphiboles along the tremolite-pargasite join have been hydrothermally synthesized at 900°C, 3 kbar. Run products were characterized by optical and electron microscopy, powder X-ray diffraction and infrared spectroscopy. Under the experimental conditions used, there is complete solid-solution between tremolite and pargasite and the variation of cell parameters is linear as a function of composition. The infrared spectra in the principal OH-stretching region are consistent with the predictions of Hawthorne (1997) on local bond-valence grounds, and show strong short-range order of cations at the octahedral sites and strong coupling between Al at T(1) and Na at A.
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Submitted on : Wednesday, May 17, 2006 - 2:42:33 PM
Last modification on : Tuesday, October 19, 2021 - 6:59:09 PM

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Giancarlo Della Ventura, Franck C. Hawthorne, Jean-Louis Robert, Gianluca Iezzi. Synthesis and infrared spectroscopy of amphiboles along the tremolite-pargasite join.. European Journal of Mineralogy, Copernicus, 2003, 15, pp.341-347. ⟨10.1127/0935-1221/2003/0015-0341⟩. ⟨hal-00069365⟩

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