title: Formation of octacalcium phosphates with co-incorporated succinate and suberate ions.
abstract: Octacalcium phosphates (OCPs) co-incorporated with various molar ratios of succinate and suberate ions were synthesized by wet processing. The interplanar spacings of the (100) planes (d(100)) of OCPs formed in the presence of succinic acid (Suc) or suberic acid (Sub) were larger than those of OCPs formed without addition of a dicarboxylic acid to the reaction solvent. The increases in the interplanar spacings of the (100) planes were caused by substitution of HPO(4)(2-) by dicarboxylate ions. The OCPs with co-incorporated succinate and suberate ions, i.e. solid solutions of OCP with incorporated Suc and Sub, were formed by reactions in the presence of Suc and Sub. When the Suc/(Suc + Sub) values in the starting compositions were in the range 0.45-1.0, Suc was preferentially incorporated into the OCP. In contrast, when the Sub/(Suc + Sub) values in the starting compositions were in the range 0.60-1.0, Sub was preferentially incorporated into the OCP crystals.
authors.affiliation: Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya, Japan. yokoi.taishi@a.mbox.nagoya-u.ac.jp
authors.forename: Taishi
authors.initials: T
authors.lastname: Yokoi
authors.forename: Hidetaka
authors.initials: H
authors.lastname: Kato
authors.forename: Ill Yong
authors.initials: IY
authors.lastname: Kim
authors.forename: Koichi
authors.initials: K
authors.lastname: Kikuta
authors.forename: Masanobu
authors.initials: M
authors.lastname: Kamitakahara
authors.forename: Masakazu
authors.initials: M
authors.lastname: Kawashita
authors.forename: Chikara
authors.initials: C
authors.lastname: Ohtsuki
mesh_terms: D002130:Calcium Phosphates / Q000138:chemical synthesis* / Q000737:chemistry; D002210:Caprylates / Q000737:chemistry*; D003998:Dicarboxylic Acids / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D033362:Powder Diffraction; D013386:Succinates / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D002130:Calcium Phosphates; D002210:Caprylates; D003998:Dicarboxylic Acids; D013386:Succinates; C005738:suberic acid