Phase transitions during compression of thaumasite, Ca3Si(OH)6(CO3)(SO4)?12H2O: A high-pressure synchrotron X-ray powder diffraction study (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Phase transitions during compression of thaumasite, Ca3Si(OH)6(CO3)(SO4)?12H2O: A high-pressure synchrotron X-ray powder diffraction study (Articolo in rivista) (literal)

Anno

• 2014-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1180/minmag.2014.078.5.07 (literal)

Alternative label

• Ardit M., Cruciani G., Dondi M., Garbarino G.L., Nestola F. (2014)
  Phase transitions during compression of thaumasite, Ca3Si(OH)6(CO3)(SO4)?12H2O: A high-pressure synchrotron X-ray powder diffraction study
  in Mineralogical magazine (Online)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Ardit M., Cruciani G., Dondi M., Garbarino G.L., Nestola F. (literal)

Pagina inizio

• 1193 (literal)

Pagina fine

• 1208 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 78 (literal)

Rivista

• Mineralogical magazine (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• 1Department of Physics and Earth Sciences, University of Ferrara, via Saragat 1, I-44100 Ferrara, Italy 2Institute of Science and Technology for Ceramics (ISTEC - CNR), via Granarolo 64, I-48018 Faenza, Italy 3European Synchrotron Radiation Facility (ESRF), BP 220, 6 rue Jules Horowitz, F-38043 Grenoble Cedex, France 4Department of Geosciences, University of Padova, via Gradenigo 6, I-35131 Padova, Italy (literal)

Titolo

• Phase transitions during compression of thaumasite, Ca3Si(OH)6(CO3)(SO4)?12H2O: A high-pressure synchrotron X-ray powder diffraction study (literal)

Abstract

• The high-pressure behaviour of the thaumasite structure was investigated using synchrotron X-ray powder diffraction, up to 19.5 GPa. Based on Rietveld refinements, thaumasite retained the room pressure P63 space group throughout the whole investigated pressure range while the pressure dependence of the refined unit cell parameters can be cast into three different compression regimes, each corresponding to a different thaumasite phase (th-I, th-II, and th-III) related by isosymmetric phase transitions. In particular, the phase transition in the 7.40-15.02 GPa P-range (i.e. from th-II to th-III) is associated to an inversion of the axial bulk moduli which, by analogy with ettringite, can be rationalized as due to a change in the relative strengths of the iono-covalent bonds along the [Ca3Si(OH)6(H2O)12]4+ columns parallel to the c-axis vs. the oxygen-hydrogen bonds linking the columns within the ab-plane. The linear inverse relationship between the low- and high-temperature data from literature with those collected under high-pressure conditions reveals that the same bonding regime governs the anisotropic expansion and contraction of thaumasite up to about 1.4 GPa and 400K (HP-HT stability limits of th-I phase). (literal)

Prodotto di

• Tecnologie innovative per l'edilizia (SP.P01.037.003) (Modulo)
• Institute of science and technology for ceramics (ISTEC) (Istituto)

Autore CNR

• MICHELE DONDI (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "Phase transitions during compression of thaumasite, Ca3Si(OH)6(CO3)(SO4)?12H2O: A high-pressure synchrotron X-ray powder diffraction study" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute of science and technology for ceramics (ISTEC) (Istituto)
• Tecnologie innovative per l'edilizia (SP.P01.037.003) (Modulo)

Autore CNR di

• MICHELE DONDI (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Mineralogical magazine (Rivista)

Insieme di parole chiave di

• Parole chiave di "Phase transitions during compression of thaumasite, Ca3Si(OH)6(CO3)(SO4)?12H2O: A high-pressure synchrotron X-ray powder diffraction study" (Insieme di parole chiave)