Premium
Investigation of Fluorine Distribution on the Surface of Acid‐Treated Apatite Single Crystals using Nuclear Resonant Reaction Analysis
Author(s) -
Theodossiu W.,
Misaelides P.,
Godelitsas A.
Publication year - 2001
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/1521-4079(200111)36:11<1247::aid-crat1247>3.0.co;2-h
Subject(s) - fluorapatite , apatite , fluorine , crystallinity , nuclear chemistry , chemistry , nuclear reaction analysis , mineral , materials science , inorganic chemistry , mineralogy , crystallography , ion , organic chemistry
The surface of natural fluorine‐containing apatite (fluoroapatite) single crystals treated with acidic solutions of pH between 0.05 and 2.5 was investigated by nuclear resonant reaction analysis (NRRA) techniques using the 19 F(p,αγ) 16 O nuclear reaction. The experimental results showed that partial defluoridation takes place due to acid attack characteristically depending on the pH of the solutions. Powder‐XRD data indicated that the crystallinity of the apatite surface was etained despite of the etchpits observed by SEM‐EDS. Relevant investigations of the surface of acid‐treated apophyllite crystals, a typical fluorine‐containing mineral, indicated a complete amorphization and besides a total absence of fluorine.