Influence of disodium hydrogen phosphate dodecahydrate on hydrothermal formation of hemihydrate calcium sulfate whiskers

- High-aspect-ratios CaSO4·0.5H2O were synthesized via a Na2HPO4·12H2O-assisted hydrothermal method.
- High super-saturation achieved in the presence of Na2HPO4·12H2O favored formation of CaSO4·0.5H2O.
- Na2HPO4·12H2O promoted formation of CaSO4·0.5H2O with thinner diameter and shorter length.