A powder sample of 2M1 muscovite, was studied by time-of-flight neutron diffraction at 1 bar and at 2(± 0.1) GPa. Rietveld refinements of the crystal structure were performed, varying all atomic coordinates in the room-pressure case and only the z coordinates of basal O atoms plus xyz of O and H of the OH group at 2 GPa. In both cases the lattice constants were refined. The unit-cell compression shows deviations from linear elastic behaviour. Inter-layer K-O bonds are compressed along z more than the c lattice constant. The O-H group forms an angle of 85(1)° with c* and establishes three very loose contacts with neighbouring O atoms. This environment does not change appreciably at 2 GPa. -Authors

Powder neutron diffraction study of 2M1 muscovite at room pressure and at 2 GPa / M. Catti, G. Ferraris, S. Hull, A. Pavese. - In: EUROPEAN JOURNAL OF MINERALOGY. - ISSN 0935-1221. - 6:2(1994), pp. 171-178. [10.1127/ejm/6/2/0171]

Powder neutron diffraction study of 2M1 muscovite at room pressure and at 2 GPa

A. Pavese
Ultimo
1994

Abstract

A powder sample of 2M1 muscovite, was studied by time-of-flight neutron diffraction at 1 bar and at 2(± 0.1) GPa. Rietveld refinements of the crystal structure were performed, varying all atomic coordinates in the room-pressure case and only the z coordinates of basal O atoms plus xyz of O and H of the OH group at 2 GPa. In both cases the lattice constants were refined. The unit-cell compression shows deviations from linear elastic behaviour. Inter-layer K-O bonds are compressed along z more than the c lattice constant. The O-H group forms an angle of 85(1)° with c* and establishes three very loose contacts with neighbouring O atoms. This environment does not change appreciably at 2 GPa. -Authors
Settore GEO/06 - Mineralogia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/180199
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