Nonstoichiometry in chlorellestadite
(2005) In Solid State Sciences 7(1). p.97-102- Abstract
- The structural development of apatite-type chlorellestadite was studied as a function of annealing time by Rietveld refinements based on X-ray powder diffraction data (Cu-K-alpha1). Annealing (900-1100 degreesC) in air of chlorellestadite with the unit cell content: Ca-9(SiO4)(3)(SO4)(3)-(1-x)CaC1(2) (x approximate to 0) produced a nonstoichiometric phase (0 less than or equal to x less than or equal to 0.6), which then upon further heating decomposed into ternesite Ca-5 (SiO4)(2)(SO4), anhydrite CaSO4 and lime CaO. Increasing the temperature caused a more rapid loss of CaCl2 and a more rapid onset of decomposition into the former phases. Crystal data of the chlorellestadite series: hexagonal symmetry, space group P6(3)/m (0 less than or... (More)
- The structural development of apatite-type chlorellestadite was studied as a function of annealing time by Rietveld refinements based on X-ray powder diffraction data (Cu-K-alpha1). Annealing (900-1100 degreesC) in air of chlorellestadite with the unit cell content: Ca-9(SiO4)(3)(SO4)(3)-(1-x)CaC1(2) (x approximate to 0) produced a nonstoichiometric phase (0 less than or equal to x less than or equal to 0.6), which then upon further heating decomposed into ternesite Ca-5 (SiO4)(2)(SO4), anhydrite CaSO4 and lime CaO. Increasing the temperature caused a more rapid loss of CaCl2 and a more rapid onset of decomposition into the former phases. Crystal data of the chlorellestadite series: hexagonal symmetry, space group P6(3)/m (0 less than or equal to x less than or equal to 0.6); and a = 9.677 Angstrom, c = 6.858 Angstrom for x approximate to 0; as compared to a = 9.561 Angstrom, c = 6.895 Angstrom for x approximate to 0.6. The results indicated that the chlorellestadite structure can accommodate an unusually high level of Schottky defects. (C) 2004 Elsevier SAS. All rights reserved. (Less)
Please use this url to cite or link to this publication:
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- author
- Jegou Saint-Jean, Simon LU and Hansen, Staffan LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Solid State Sciences
- volume
- 7
- issue
- 1
- pages
- 97 - 102
- publisher
- Elsevier
- external identifiers
-
- wos:000226561200014
- scopus:11844280906
- ISSN
- 1873-3085
- DOI
- 10.1016/j.solidstatesciences.2004.10.014
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)
- id
- beae9492-d61a-42a3-9feb-f0a4e3989e27 (old id 152224)
- date added to LUP
- 2016-04-01 11:38:10
- date last changed
- 2022-04-20 19:35:52
@article{beae9492-d61a-42a3-9feb-f0a4e3989e27, abstract = {{The structural development of apatite-type chlorellestadite was studied as a function of annealing time by Rietveld refinements based on X-ray powder diffraction data (Cu-K-alpha1). Annealing (900-1100 degreesC) in air of chlorellestadite with the unit cell content: Ca-9(SiO4)(3)(SO4)(3)-(1-x)CaC1(2) (x approximate to 0) produced a nonstoichiometric phase (0 less than or equal to x less than or equal to 0.6), which then upon further heating decomposed into ternesite Ca-5 (SiO4)(2)(SO4), anhydrite CaSO4 and lime CaO. Increasing the temperature caused a more rapid loss of CaCl2 and a more rapid onset of decomposition into the former phases. Crystal data of the chlorellestadite series: hexagonal symmetry, space group P6(3)/m (0 less than or equal to x less than or equal to 0.6); and a = 9.677 Angstrom, c = 6.858 Angstrom for x approximate to 0; as compared to a = 9.561 Angstrom, c = 6.895 Angstrom for x approximate to 0.6. The results indicated that the chlorellestadite structure can accommodate an unusually high level of Schottky defects. (C) 2004 Elsevier SAS. All rights reserved.}}, author = {{Jegou Saint-Jean, Simon and Hansen, Staffan}}, issn = {{1873-3085}}, language = {{eng}}, number = {{1}}, pages = {{97--102}}, publisher = {{Elsevier}}, series = {{Solid State Sciences}}, title = {{Nonstoichiometry in chlorellestadite}}, url = {{http://dx.doi.org/10.1016/j.solidstatesciences.2004.10.014}}, doi = {{10.1016/j.solidstatesciences.2004.10.014}}, volume = {{7}}, year = {{2005}}, }