TY - JOUR
T1 - The Mössbauer spectrum of synthetic hureaulite: Fe52+(H2O)4(PO4H)2(PO 4)2
AU - Bustamante, Angel
AU - Mattievich, Enrico
AU - De Amorim, Helio S.
AU - Vencato, Ivo
AU - Silveira, Máximo M.
PY - 2005/11/1
Y1 - 2005/11/1
N2 - The crystal structure of synthetic ferrous hureaulite, Fe52+ (H2O)4(PO4H)2(PO 4)2, was refined from single-crystal X-ray data. It is monoclinic, space group C2/c, with a=17.487(4), b=9.017(2), c=9.338(2) Å, β=96.27(3)°, V=1463.6(6) Å3, Z=4 and D calc=3.327 g/cm3. This end member of the hureaulite series was crystallized under distinctly acidic conditions, by a method that gives perfect crystals, large enough for X-ray single crystal studies. The main feature of the hureaulite structure is that it has an equal number of normal (PO4)3+ and acid (PO4H)2+ tetradentate groups. These are centered on Fe2+ atoms and share corners with edge-linked octahedra, forming pentamer units. The five Fe 2+ atoms are distributed on three distinct sites in these units. This can be directly observed in the Mössbauer spectrum at 295 K, which contains three doublets whose relative intensities correspond to the 1:2:2 distributions of crystallographic sites. © 2006 Springer Science+Business Media, Inc.
AB - The crystal structure of synthetic ferrous hureaulite, Fe52+ (H2O)4(PO4H)2(PO 4)2, was refined from single-crystal X-ray data. It is monoclinic, space group C2/c, with a=17.487(4), b=9.017(2), c=9.338(2) Å, β=96.27(3)°, V=1463.6(6) Å3, Z=4 and D calc=3.327 g/cm3. This end member of the hureaulite series was crystallized under distinctly acidic conditions, by a method that gives perfect crystals, large enough for X-ray single crystal studies. The main feature of the hureaulite structure is that it has an equal number of normal (PO4)3+ and acid (PO4H)2+ tetradentate groups. These are centered on Fe2+ atoms and share corners with edge-linked octahedra, forming pentamer units. The five Fe 2+ atoms are distributed on three distinct sites in these units. This can be directly observed in the Mössbauer spectrum at 295 K, which contains three doublets whose relative intensities correspond to the 1:2:2 distributions of crystallographic sites. © 2006 Springer Science+Business Media, Inc.
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U2 - 10.1007/s10751-006-9326-1
DO - 10.1007/s10751-006-9326-1
M3 - Article
SN - 0304-3843
SP - 599
EP - 603
JO - Hyperfine Interactions
JF - Hyperfine Interactions
ER -