Danger of collapse! The structure of hydrated high-alumina cement, whose use as a building material was highly controversial after several accidents occurred, was now determined to be CaAl2O4⋅7.8 H2O from X-ray powder diffraction data by applying direct methods. A picture of the structure as viewed along the c axis is shown on the right.
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Gispert‐Guirado et al. (1998) studied this question.