Dipotassium carbonate sesquihydrate: rerefinement against new intensity data

The redetermination of the structure of the title compound, K2CO3·1.5H2O, agrees with the results previously reported by Hunter & Jeffrey [J. Chem. Phys (1967), 47, 3297–3302], but with improved precision. The structure is described in terms of the hydrogen-bonding network and the K–O framework, and the C—O bond lengths are compared with those found in other reported alkali carbonate hydrates.