Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/5878
Authors: | Bellatreccia, F.* Della Ventura, G.* Piccinini, M.* Cavallo, A.* Brilli, M.* |
Title: | H2O and CO2 in minerals of the hauyne-sodalite group: an FTIR spectroscopy study | Journal: | Mineralogical Magazine | Series/Report no.: | /73(2009) | Publisher: | The Mineralogical Society | Issue Date: | 6-Jul-2009 | DOI: | 10.1180/minmag.2009.073.3.399 | Keywords: | sodalite, hauyne, nosean, lazurite, H2O and CO2, cell parameters, EMP analysis, CHN analysis, FTIR powder, single-crystal spectroscopy | Subject Classification: | 04. Solid Earth::04.01. Earth Interior::04.01.04. Mineral physics and properties of rocks | Abstract: | This paper reports an infrared spectroscopic study of a set of sodalite-group minerals. The specimens have been identified using a combination of X-ray diffraction and microchemical analysis. As expected, the Si/Al ratio is ~1; the extra framework cation content is characterized by a well-defined Na -(Ca+K) substitution. The lattice parameters of the studied samples range from sodalite (sample LM11) with a = 8.889(2) A , to hauyne (sample HR3S) with a = 9.1265(2) A. The specimens, having the SO4-- group as a dominant anion, show a clear correlation between the a cell edge and the K content. Single-crystal FTIR spectroscopy shows that hauyne and nosean typically contain enclathrated CO2 molecules,in addition to H2O and minor carbonate, while sodalite is virtually CO2-free. Detailed microspectrometric mappings show a non-homogeneous distribution of volatile constituents across the crystals, which may be related to the presence of fractures in the crystals. Because of such zoning, a relatively wide variation is observed when calibrating extinction coefficients on the basis of a bulk analytical method such as CHN elemental analysis. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
ING-04-bell.pdf | 1.31 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
50
19
checked on Feb 10, 2021
Page view(s) 50
193
checked on Apr 24, 2024
Download(s)
47
checked on Apr 24, 2024