𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthetic and natural chlorine-bearing apatite

✍ Scribed by Tom K. Ekström

Publisher
Springer
Year
1973
Tongue
English
Weight
579 KB
Volume
38
Category
Article
ISSN
0010-7999

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✦ Synopsis

Hydrothermal syntheses of chlor-hydroxyapatite have been carried out between 300 and 700 ~ C at a constant pressure of 1000 bar. The substitution of OH for C1 varies as a function of the amount of added CaCle, temperature, and ptt. In the main reaction the incorporation of C1 is negligible at 300 ~ C but increases to over 40 mole percent Cl-apatite at 700 ~ C. A simple X-ray method for determining the CI/CI~-OH ratio has been developed and this is also extended to fluorine-bearing chlor-hydroxyapatites. A number of natural chlor-fhiorhydroxyapatites are discussed in the light of the X-ray method and the result of the synthesis.

📜 SIMILAR VOLUMES

Coupled anion substitution in natural ca
Coupled anion substitution in natural carbon-bearing apatites
✍ Günter Binder; Georg Troll 📂 Article 📅 1989 🏛 Springer 🌐 English ⚖ 768 KB

Reliable wet chemical methods of minor element analysis (F, C1, OH) and X-ray diffraction studies reveal that a coupled substitution of fluorine and carbonate is required in natural carbon-bearing apatites. Thus, CO z--F-replaces PO, 3-with tetravalent carbon substituting for pentavalent phosphorus