The luminescence spectra of naturally occurring apatite Ca 5 [F (PO 4 ) 3 ] and fluorite CaF 2 crystals, containing traces of rare-earth elements have been compared with phosphate glasses doped with Pr 3+ , Sm 3+ and Er 3+ ions. The selected excitation bands for luminescence of samarium and praseody
Deficiency of phosphate ions in apatite
β Scribed by Duncan McConnell
- Publisher
- Springer
- Year
- 1965
- Tongue
- English
- Weight
- 153 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0028-1042
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## Abstract In this study, we report a new observation on the phase conversion that occurs during the sintering of hydroxyapatite (HA)βtricalcium phosphate (TCP) biphasic ceramics. During the sintering of the HAβTCP mixture powders, a large amount of TCP was converted into HA, as detected by Xβray
Calcium deficient apatites, which could be used as precursors of the inorganic component of biological apatites, have been synthesised by controlled crystallisation. The influence of the pH and the reaction time in the calcium deficiency and the crystal size of samples have been studied. For determi