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Hydrothermal synthesis and crystal structure of SrAl2(PO4)2F2: A new three-dimensional framework with channels delimited by a helical anionic border

Elsevier B.V.
Publication Date
DOI: 10.1016/s0992-4361(99)80005-8
  • Earth Science
  • Geography


Abstract The new compound SrAl 2(PO 4) 2F 2 has been synthesised by a hydrothermal method (700°C, 195 MPa, 24 h). The structure was determinated by X-ray diffraction on single crystal. SrAl 2(PO 4) 2F 2 crystallises in the non-centrosymmetric space group P2 12 12 1 (N o19) with a = 12.026(1) Å, b = 12.199(1) Å, c = 4.666(1) Å, V = 684.6(5) Å 3 and Z = 4. Its structure is built up from corner-linkage between octahedral and tetrahedral units. The resulting tridimensional framework exhibits channels along [001] delimited by oxygen anions helically distributed. The Sr 2+ cations are inserted inside the channels.

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