Alkaline Earth Phosphates.

Preparation and Characterization of Carbonated Barium Hydroxyapatites

“…As shown in Table 1, the solutions containing different amounts of H 3 PO 4 (0.03-0.10 mol) were added to the solution containing 0.20 mol Ba(OH) 2 ⅐ 8H 2 O with stirring under an N 2 atmosphere at 100°C. As is seen in this table, the Ba/P molar ratio of the starting solution was 2.00 -6.67 and the solution pH was maintained above 12 where BaHAP can be formed (21). The synthetic conditions other than the amount of H 3 PO 4 added were the same as those of the preparation by mixing at different temperatures mentioned above.…”

The alkoxide sol-gel process in the calcium phosphate system and its applications

“…The lack of appearance of b-TCP in sample CP4-6 implies that the equilibrated precipitates, sample CP4-1, could be in the form of CaHPO 4 ÁxHOGOH, which conforms with the case in an aqueous system with a low pH value. 17 …”

Structure de la forme triclinique du monophosphate acide de baryum

“…Le monophosphate acide Ba(H2PO4) 2 existe sous deux formes: l'une orthorhombique, l'autre triclinique. L'&ude chimique etla pr6paration de ces phases est bien connue (Tartar & Lorah, 1924;Mooney & Aia, 1961). Les donn6es cristallographiques ont &6 &ablies et repertori6es (Lehr, Brown, Frazier, Smith & Trasmer, 1967).…”