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1. Spec: Dihydrate and anhydrous standards.

2. Magnesium phthalate dihydrate was synthesized by rheological phase reaction.

3. The crystallization course of dihydrate calcium sulphate affected by APA was also researched.

4. The composite binder of dihydrate phosgypsum and fly ash (PGF) is a new kind of binder made from unpretreated phosgypsum, fly ash and activator.

5. It reduces dehydration temperature and solubility of dihydrate gypsum, makes gypsum crystals thick and wide, and reduces the strength of hardened body.

6. Substitute anhydrous gypsum for dihydrate gypsum in Potland cement production to study the effect of anhydrous gypsum on performance of Potland cement.

7. Organic matter weakens the combination of dihydrate gypsum crystals and makes the strength reduce.

8. The calcium sulphate dihydrate whisker is treated by microwave heating, forming calcium sulfate hemihydrate or anhydrous sulphate of calcium after dehydration.

9. Sodium dichromate dihydrate is an inorganic compound containing hexavalent chromium that was used in the NTP studies.

10. The yield of oxalic acid dihydrate is up to 80 % under the optimum condition.

11. By using the double firing process and dihydrate gypsum as the main raw material, white - glazed gypsum ceramic tiles for walls and floors are produced under relatively low temperature.

12. The result showed that if the waste slag compose of 10% fluid and react with low concentrated sulfuric acid, 90% dihydrate plaster would be prepared.

13. The results show that the catalytic efficiency of complicated catalyst of tin( II) chloride dihydrate andp -toluene-sulfonic acid is higher than that of the others.

14. The effecting law and action mechanism of retarders on hydration process of building gypsum, crystal morphology of dihydrate and pore structure have also been revealed.

15. The calcium sulfate whisker is a fibrous monocrystal of calcium sulfate dihydrate, calcium sulfate hemihydrate or anhydrous calcium sulfate.

16. Patented fibre complex of organic plant source. Excipients: microcrystalline cellulose, dihydrate, silica, povidone and magnesium stearate.

17. The preferred adsorption of retarders on different faces of gypsum crystal changes growth habit of dihydrate crystal and its crystal morphology.

18. The adsorption of retarders on the surface of nuclei newly produced inhibits the crystal growth of dihydrate and accordingly controls the hydration process of gypsum.

19. The retarders have changed the growth habit of the dihydrate gypsum crystal, and changed the crystal from needle-shaped in-to short columnar,[sentencedict.com/dihydrate.html] as well as notably increased its dimensions.

20. They have established a precise measuring-calculating system to determine the variation of concentration for all species in the super saturated solution of calcium sulfate dihydrate(CSD).

21. Test results show that cement strength would be decreased when adding anhydrite than adding dihydrate gypsum.