Open AccessNew iodine-apatites: synthesis and crystal structure
Author(s) -
Е. Н. Буланов,
S. G. Petrov,
A. V. Knyazev
Publication year - 2021
Publication title -
turkish journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.239
H-Index - 46
eISSN - 1303-6130
pISSN - 1300-0527
DOI - 10.3906/kim-2102-5
Subject(s) - chemistry , crystal structure , apatite , iodine , halogen , rietveld refinement , crystallography , mineralogy , organic chemistry , alkyl
The paper describes methods for the preparation of compounds with an apatite structure containing only iodine atoms in the “halogen” position. The crystal structure of the compounds was refined by the Rietveld method. The resulting apatites have a structure with a space group P 6 3 / m and have the following unit cell parameters: Ba 4f1.78(2) Ba 6h2.75(2) (PO 4 ) 3 I 0.04(2) ( a = 10.18609(34) Å, c = 7.71113(30) Å, V = 692.889(54) Å 3 , R = 5.448 %), Pb 4f1.82(2) Pb 6h2.75(2) (PO 4 ) 3 I 0.13(2) ( a = 9.87882(18) Å, c = 7.43222(16) Å, V = 628.144(26) Å 3 , R = 8.533 %), Pb 4f1.90(2) Pb 6h2.68(2) (PO 4 ) 3 I 0.16(2) ( a = 9.87058(48) Å, c = 7.41255(46) Å, V = 625.437(72) Å 3 , R = 5.433 %). The study of the crystal structure showed a relatively low efficiency of the binding of iodine in the apatite matrix.