This paper presents a method for preparing crystals of triclinic calcium pyrophosphate (t-CPPD). A calcium pyrophosphate intermediate is first prepared by reaction of potassium pyrophosphate and calcium chloride. Samples of the intermediate are dissolved in hydrochloric acid and urea added. Upon heating to 95–100 °C, hydrolysis of the urea causes the pH to rise and t-CPPD crystallises out. Purity of the product was ascertained by chemical and physical analysis. Where large crystals are required an unstirred system is used, while smaller crystals are produced by stirring the reaction mixture.
|Translated title of the contribution||Synthesis of triclinic calcium pyrophosphate crystals|
|Number of pages||6|
|Journal||Journal of Materials Science: Materials in Medicine|
|Early online date||3 Feb 2007|
|Publication status||Published - Jul 2007|