Role of Strontium on the Crystallization of Calcium Hydrogen Phosphate Dihydrate (CHPD)
نویسنده
چکیده
Calcium hydrogen phosphate dihydrate (CHPD, CaHPO4· 2H2O) or brushite is found quite frequently in urinary calculi (stones). Crystallization of brushite has been carried out in sodium metasilicate (SMS) gel with and without adding ‘Sr’ as additive. In pure system, dicalcium phosphate anhydrous (DCPA, CaHPO4) or monetite and hydroxyapatite (HA, Ca5(PO4)3(OH)) grew along with brushite. The presence of Sr suppressed the formation of HA and enhanced the number and size of monetite crystals and changed the morphology of brushite crystals from needle shape to octopus-like shape. The samples were characterized by powder & single crystal X-ray diffraction (XRD), scanning electron microscopy (SEM), Xray fluorescence spectroscopy (XRF), Fourier transform infrared spectroscopy (FTIR) and thermal analyses (TG-DTA).
منابع مشابه
Inhibition of growth of urinary type calcium hydrogen phosphate dihydrate crystals by tartaric acid and tamarind
Urinary stone is one of the oldest and the most common afflictions in humans, animals and birds. A number of people suffer from urinary stones. Brushite or calcium hydrogen phosphate dihydrate (CHPD) crystals are frequently found in urinary stones. Many fruits contain high amount of tartaric acid. Therefore, the effect of tartaric acid on the growth of CHPD crystals is presented in this article...
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