OCCURRENCE OF CHLORIDE IONS IN APATITE LATTICE OF HOLLY SPRINGS HYDROSYAPATITE AND DENTAL ENAMEL
OCCURRENCE OF CHLORIDE IONS IN APATITE LATTICE OF HOLLY SPRINGS HYDROSYAPATITE AND DENTAL ENAMEL
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DOI：
10.1007/bf02062611
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发表时间：
1971-01-01
期刊：
影响因子：
--
通讯作者：
ELLIOTT, JC
中科院分区：
文献类型：
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作者：
DYKES, E;ELLIOTT, JC
The hydroxyl stretching mode in hydroxyapatite occurs as a single absorption band in the infra-red spectrum at 3570 cm−1. When there is approximately 10% replacement of hydroxyl ions by chloride ions, an extra band appears at 3498 cm−1which is assigned to hydroxyl ions forming weak hydrogen bonds with adjacent chloride ions. A similar extra band appears at 3545 cm−1in the infra-red spectrum of a synthetic fluor-hydroxyapatite. Mineral Holly Springs hydroxyapatite contains fluorine and was also found to contain chlorine. The infra-red spectrum showed, in addition to the unperturbed hydroxyl stretching mode at 3570 cm−1, two sharp bands at 3543 cm−1and 3498 cm−1which are assigned to hydroxyl ions hydrogen-bonded with fluorine and chlorine respectively. The infra-red spectrum of human enamel, which is known to contain about 0.3% by weight of chlorine shows a weak band at 3500 cm−1and it is proposed that this is due to chloride ions present in the apatite lattice.
