http://www.cnr.it/ontology/cnr/individuo/prodotto/ID63931
Carbon-bearing cordierite from Allumiere (Tolfa volcanic center, Latium, Italy): occurrence, crystal-structure and FTIR microspectroscopy. (Articolo in rivista)
- Type
- Label
- Carbon-bearing cordierite from Allumiere (Tolfa volcanic center, Latium, Italy): occurrence, crystal-structure and FTIR microspectroscopy. (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Alternative label
Della Ventura G.; Bellatreccia F.; Cámara F.; Oberti F.; Lorand J.P.; Parodi G.C.; Carlier G.; Di Domenico, D. (2006)
Carbon-bearing cordierite from Allumiere (Tolfa volcanic center, Latium, Italy): occurrence, crystal-structure and FTIR microspectroscopy.
in Periodico di mineralogia (Testo stamp.)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Della Ventura G.; Bellatreccia F.; Cámara F.; Oberti F.; Lorand J.P.; Parodi G.C.; Carlier G.; Di Domenico, D. (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Dip. Scienze Geologiche, Università Roma Tre, Largo S. Leonardo Murialdo 1, I-00146 Roma, Italy
CNR-Istituto di Geoscienze e Georisorse, Unità di Pavia, via Ferrata 1, I-27100 Pavia, Italy
Unité Scientifique de Minéralogie CNRS 7160, Dept. Histoire de la Terre,Museum National d'Histoire Naturelle, 61, rue Buffon, F-75005 Paris
Via VII Settembre 9, I-00051 Allumiere, Roma, Italy (literal)
- Titolo
- Carbon-bearing cordierite from Allumiere (Tolfa volcanic center, Latium, Italy): occurrence, crystal-structure and FTIR microspectroscopy. (literal)
- Abstract
- This paper reports the crystalchemical
study of cordierite from a volcanic ejectum
from the Tolfa volcanic center (Latium, Italy). The
studied rock was sampled within the pyroclastic
deposit (gtufo caoticoh) outcropping in a quarry at
Colle dello Spizzicatore, Allumiere Community.
The sample was studied by electron microprobe
analysis (EMP), single-crystal structure refinement
and Fourier-transform infrared microspectroscopy
(FTIR). Combination of these techniques allowed
detailed characterisation of the amount, location and
coordination of cations and volatile molecules in the
channels.
Cordierite from Allumiere is orthorhombic, space
group Cccm; refined cell-parameters are (in A): a =
17.1580(6), b = 9.7573(3) and c = 9.3228(3). EMP
analyses show an intermediate XMg [Mg/(Mg+Fe) =
0.58], and a very low alkali (Na + K = 0.042 apfu)
content. Single-crystal FTIR spectra are strongly
polarised; the absorptions observed in the H2Ostretching
region can be assigned to H2O molecules
oriented with the HcH vector // a and the molecular
plane // (001). The absorptions observed in the C-O
stretching region can be assigned to both CO2 and
CO molecules oriented // a; the spectra also show the
presence of 13C and 18O in the sample. Using the molar
absorption coefficients available in the literature, H2O
= 0.02 wt% and CO2 = 0.22 wt% are calculated from
the measured band intensities. The observed mineral
assemblage and the volatile composition of cordierite
are coherent with a thermometamorphic overprint
on an early metapelite, which occurred at low-P (.
2 Kbar), high-T (> 700
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