Armenite, ideal formula BaCa(2)Al(6)Si(9)O(30)center dot 2H(2)O, and its dehydrated analog BaCa(2)Al(6)Si(9)O(30) and epididymite, ideal formula Na(2)Be(2)Si(6)O(15)center dot H(2)O, and its dehydrated analog Na(2)Be(2)Si(6)O(15) were studied by low-temperature relaxation calorimetry between 5 and 300 K to determine the heat capacity, C(p), behavior of their confined H(2)O. Differential thermal analysis and thermogravimetry measurements, FTIR spectroscopy, electron microprobe analysis and powder Rietveld refinements were under-taken to characterize the phases and the local environment around the H(2)O molecule.
Molecular H2O in armenite, BaCa2Al6Si9O30 center dot 2H(2)O, and epididymite, Na2Be2Si6O15 center dot H2O: Heat capacity, entropy and local-bonding behavior of confined H2O in microporous
DALCONI, MARIA CHIARA;ARTIOLI, GILBERTO
2010
Abstract
Armenite, ideal formula BaCa(2)Al(6)Si(9)O(30)center dot 2H(2)O, and its dehydrated analog BaCa(2)Al(6)Si(9)O(30) and epididymite, ideal formula Na(2)Be(2)Si(6)O(15)center dot H(2)O, and its dehydrated analog Na(2)Be(2)Si(6)O(15) were studied by low-temperature relaxation calorimetry between 5 and 300 K to determine the heat capacity, C(p), behavior of their confined H(2)O. Differential thermal analysis and thermogravimetry measurements, FTIR spectroscopy, electron microprobe analysis and powder Rietveld refinements were under-taken to characterize the phases and the local environment around the H(2)O molecule.File in questo prodotto:
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