XRD, EDX and IR analysis of solid solutions between thaumasite and ettringite

Effect of pressure on the crystal structure of ettringite

“…We assign the sharp absorption at 3634cm -1 as being due to non-hydrogen bonded O-H stretch, the broad absorption at 3422cm -1 as due to hydrogen bonded O-H stretch and free water, the peak at 1674cm -1 as due to O-H bend and the peak at 1108cm -1 as due to S-O stretch from SO 4 2-groups in line with previous assignations [24][25][26][27]. The effect of pressure on the infrared spectrum of ettringite is shown in figure 8 …”

Single-crystal elastic constants of natural ettringite

“…Ettringite forms a partial solid solution with thaumasite [Ca 3 Si (OH) 6 with existing data for the ettringite endmember [10] confirms that our sample correspond to almost pure ettringite (Fig. 1).…”

Rietveld Quantitative Phase Analysis of OPC Clinkers, Cements and Hydration Products

“…Hence, the effect of ettringite on thaumasite formation was studied in synthetic OPC materials using this methodology (Kholer et al 2006). It must be highlighted that ettringite and thaumasite form a solid solution that has been extensively studied (Barnett et al 2002;Torres et al 2004). …”