Solid solutions between ettringite, Ca6Al2(SO4)3(OH)12·26H2O, and thaumasite, Ca3SiSO4CO3(OH)6·12H2O

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• 作者：Barnett ; S. J. ; Adam ; C. D. ; Jackson ; A. R. W.
• 刊名：Journal of Materials Science
• 出版年：2000
• 出版时间：2000
• 年：2000
• 卷：35
• 期：16
• 页码：4109-4114
• 全文大小：209 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

A series of solid solution phases between ettringite, Ca$\_6$Al$\_2$(SO$\_4$)$\_3$(OH)$\_12$·26H$\_2$O, and thaumasite, Ca$\_3$SiSO$\_4$CO$\_3$(OH)$\_6$·12H$\_2$O, have been prepared and analysed by X-ray powder diffraction and full pattern fitting. Solid solutions were shown to exist with both the ettringite structure (space group P31c) and the thaumasite structure (space group P6$\_3$, c-axis halved). A possible discontinuity was identified, characterised by a gap in the a-dimension of the solid solution phases produced. This discontinuity is believed to correspond to a switch between the ettringite space group and the thaumasite space group. It is suggested that any discontinuity in the solid solution is caused by differences in the hydrogen bonding of the two structures.