Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 321, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2023.123872
Keywords
Fluoride-phosphates; Fluorophosphates; Building units; Single crystal X-Ray diffraction
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Three new fluoride phosphates and fluorophosphates, Ba3Fe(PO4)F6, Ba3Ga(PO3.5F0.5)O0.5F5.5 and Ba3Fe(PO3F)F7, were synthesized through fluoride-rich hydrothermal reactions. Ba3Fe(PO4)F6 and Ba3Ga(PO3.5F0.5)O0.5F5.5 have a three-dimensional structure consisting of [M(PO4-x)F4]4-x chains and two-dimensional [Ba3F2-xOx]4+x layers [M = Fe,Ga; x = 0,0.5], while Ba3Fe(PO3F)F7 contains distorted two-dimensional [Ba3F2]4+ layers and [Fe(PO3F)F5]4-dimers. Two-dimensional [Ba3F2]4+ layers are formed by fluorine-centred tetrahedra.
Three new fluoride phosphates and fluorophosphates, Ba3Fe(PO4)F6, Ba3Ga(PO3.5F0.5)O0.5F5.5 and Ba3Fe(PO3F) F7, have been synthesized through fluoride-rich hydrothermal reactions. Isostructural Ba3Fe(PO4)F6 and Ba3G-a(PO3.5F0.5)O0.5F5.5 revealed a three-dimensional structure comprised of [M(PO4-x)F4]4-x chains and two-dimensional [Ba3F2-xOx]4+x layers [M = Fe,Ga; x = 0,0.5], while Ba3Fe(PO3F)F7 contained distorted two-dimensional [Ba3F2]4+layers and [Fe(PO3F)F5]4-dimers. Two-dimensional [Ba3F2]4+ layers are formed by fluorine-centred tetrahedra. Close examinations of bond length and bond strength in fluorine-centred tetrahedron complexes suggested that fluorine-centred tetrahedra are indeed reasonable structural subunits.
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