Crystal Structure and Polarized Raman Spectra of Ca6Sm2Na2(PO4)6F2
作者： Mohamed Toumi , Leila Smiri-Dogguy , Alain Bulou
关键词:
摘要: Abstract The crystal structure of a new apatite Ca6Sm2Na2(PO4)6F2 has been determined using 842 independent reflections (R=0.059, Rw=0.076). unit cell constants are a=9.3895(3) A, c=6.8950(4) A with P63/m space group. contains disordered cations in both the Ca(1) and Ca(2) sites. formula assigned to compound is [Ca1.57Sm0.43Na2](1) [Ca4.43Sm1.57](2)(PO4)6F2. Raman spectra have studied they consistent proposed structure. comparison fluorapatite shows that most lines significantly broad, which attributed random distribution three kinds atoms on cation
harvard.edu
elsevier.com
sci-hub.se 参考文章(11)
P. E. Mackie, R. A. Young, Location of Nd dopant in fluorapatite, Ca5(PO4)3F: Nd Journal of Applied Crystallography. ,vol. 6, pp. 26- 31 ,(1973) , 10.1107/S0021889873008009
William G. Fateley, Infrared and Raman selection rules for molecular and lattice vibrations : the correlation method ,(1972)
Kazuo Nakamoto, Infrared spectra of inorganic and coordination compounds Wiley-Interscience. ,(1963)
M. Mathew, I. Mayer, B. Dickens, L.W. Schroeder, Substitution in barium-fluoride apatite: The crystal structures of Ba10(PO4)6F2, Ba6La2Na2(PO4)6F2 and Ba4Nd3Na3(PO4)6F2 Journal of Solid State Chemistry. ,vol. 28, pp. 79- 95 ,(1979) , 10.1016/0022-4596(79)90061-6
G. Blasse, The physics of new luminescent materials Materials Chemistry and Physics. ,vol. 16, pp. 201- 236 ,(1987) , 10.1016/0254-0584(87)90100-3
K. Sudarsanan, P.E. Mackie, R.A. Young, Comparison of synthetic and mineral fluorapatite, Ca5 (PO4)3F, in crystallographic detail Materials Research Bulletin. ,vol. 7, pp. 1331- 1337 ,(1972) , 10.1016/0025-5408(72)90113-4
H MONMA, Catalytic behavior of calcium phosphates for decompositions of 2-propanol and ethanol Journal of Catalysis. ,vol. 75, pp. 200- 203 ,(1982) , 10.1016/0021-9517(82)90137-3
I. Mayer, S. Cohen, The crystal structure of Ca6Eu2Na2(PO4)6F2 Journal of Solid State Chemistry. ,vol. 48, pp. 17- 20 ,(1983) , 10.1016/0022-4596(83)90054-3
R. D. Shannon, Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides Acta Crystallographica Section A. ,vol. 32, pp. 751- 767 ,(1976) , 10.1107/S0567739476001551
M. Tachihante, J.-C. Cousseins, D. Zambon, Optical study of the Tb3+ → Eu3+ energy transfer in calcium fluorapatite European Journal of Solid State and Inorganic Chemistry. ,vol. 33, pp. 713- 725 ,(1996)