Details
| Original language | English |
|---|---|
| Pages (from-to) | 589-598 |
| Number of pages | 10 |
| Journal | European journal of mineralogy |
| Volume | 15 |
| Issue number | 3 |
| Publication status | Published - 10 Jun 2003 |
Abstract
Na-cancrinite [ideal composition: Na8(AlSiO4 *(OH)2*8H2O] has been synthesized in a mixture of 1,3- or 1,4-butanediol and water either with direct reactants (silica sources: tetraethoxysilane, precipitated silica, alumina sources: aluminium sec-butoxide) or gels formed from tetraethoxysilane and aluminium sec-butoxide / aluminium isopropoxide with sodium hydroxide as mineralizing agent. The products were characterized by X-ray powder diffraction and FTIR spectroscopy at room temperature and elevated temperatures up to 1073 K, coulometric and carbon titration, thermogravimetry, scanning electron microscopy and 29Si, 23na and 27Al MAS NMR spectroscopy, as well as 1H and {1H} 13C CPMAS NMR spectroscopy. The X-ray powder patterns show cancrinite as the only phase in all samples. The spectroscopic and analytic investigations mainly suggest the presence of both molecular water and hydroxyl anions beside small impurities of carbonate. X-ray diffraction of all samples at elevated temperatures indicates decomposition temperatures in the range between 933 and 1003 K. The structure refinement of a selected sample in the hexagonal space group P63 reveals a hydroxylcancrinite with lattice parameters ao = 12.7558(3) Å and co = 5.1985(2) Å with Rp = 0.0107, Rwp = 0.0161, and R(F2) = 0.0373. The structure is characterized by water molecules and hydroxyl anions occupying two 6c positions and one 2a position, coordinating sodium in the channel.
Keywords
- Cancrinite, Characterization, NMR spectroscopy, Organic solvents, Rietveld structure refinement
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
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In: European journal of mineralogy, Vol. 15, No. 3, 10.06.2003, p. 589-598.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Characterization of basic cancrinite synthesized in a butanediol-water system
AU - Fechtelkord, Michael
AU - Posnatzki, Britta
AU - Buhl, Josef Christian
PY - 2003/6/10
Y1 - 2003/6/10
N2 - Na-cancrinite [ideal composition: Na8(AlSiO4 *(OH)2*8H2O] has been synthesized in a mixture of 1,3- or 1,4-butanediol and water either with direct reactants (silica sources: tetraethoxysilane, precipitated silica, alumina sources: aluminium sec-butoxide) or gels formed from tetraethoxysilane and aluminium sec-butoxide / aluminium isopropoxide with sodium hydroxide as mineralizing agent. The products were characterized by X-ray powder diffraction and FTIR spectroscopy at room temperature and elevated temperatures up to 1073 K, coulometric and carbon titration, thermogravimetry, scanning electron microscopy and 29Si, 23na and 27Al MAS NMR spectroscopy, as well as 1H and {1H} 13C CPMAS NMR spectroscopy. The X-ray powder patterns show cancrinite as the only phase in all samples. The spectroscopic and analytic investigations mainly suggest the presence of both molecular water and hydroxyl anions beside small impurities of carbonate. X-ray diffraction of all samples at elevated temperatures indicates decomposition temperatures in the range between 933 and 1003 K. The structure refinement of a selected sample in the hexagonal space group P63 reveals a hydroxylcancrinite with lattice parameters ao = 12.7558(3) Å and co = 5.1985(2) Å with Rp = 0.0107, Rwp = 0.0161, and R(F2) = 0.0373. The structure is characterized by water molecules and hydroxyl anions occupying two 6c positions and one 2a position, coordinating sodium in the channel.
AB - Na-cancrinite [ideal composition: Na8(AlSiO4 *(OH)2*8H2O] has been synthesized in a mixture of 1,3- or 1,4-butanediol and water either with direct reactants (silica sources: tetraethoxysilane, precipitated silica, alumina sources: aluminium sec-butoxide) or gels formed from tetraethoxysilane and aluminium sec-butoxide / aluminium isopropoxide with sodium hydroxide as mineralizing agent. The products were characterized by X-ray powder diffraction and FTIR spectroscopy at room temperature and elevated temperatures up to 1073 K, coulometric and carbon titration, thermogravimetry, scanning electron microscopy and 29Si, 23na and 27Al MAS NMR spectroscopy, as well as 1H and {1H} 13C CPMAS NMR spectroscopy. The X-ray powder patterns show cancrinite as the only phase in all samples. The spectroscopic and analytic investigations mainly suggest the presence of both molecular water and hydroxyl anions beside small impurities of carbonate. X-ray diffraction of all samples at elevated temperatures indicates decomposition temperatures in the range between 933 and 1003 K. The structure refinement of a selected sample in the hexagonal space group P63 reveals a hydroxylcancrinite with lattice parameters ao = 12.7558(3) Å and co = 5.1985(2) Å with Rp = 0.0107, Rwp = 0.0161, and R(F2) = 0.0373. The structure is characterized by water molecules and hydroxyl anions occupying two 6c positions and one 2a position, coordinating sodium in the channel.
KW - Cancrinite
KW - Characterization
KW - NMR spectroscopy
KW - Organic solvents
KW - Rietveld structure refinement
UR - http://www.scopus.com/inward/record.url?scp=0037494641&partnerID=8YFLogxK
U2 - 10.1127/0935-1221/2003/0015-0589
DO - 10.1127/0935-1221/2003/0015-0589
M3 - Article
AN - SCOPUS:0037494641
VL - 15
SP - 589
EP - 598
JO - European journal of mineralogy
JF - European journal of mineralogy
SN - 0935-1221
IS - 3
ER -