### Abstract

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.

Original language | American English |
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Pages (from-to) | 599-603 |

Number of pages | 5 |

Journal | Hyperfine Interactions |

DOIs | |

State | Published - 1 Nov 2005 |

## Fingerprint Dive into the research topics of 'The Mössbauer spectrum of synthetic hureaulite: Fe<inf>5</inf><sup>2+</sup>(H<inf>2</inf>O)<inf>4</inf>(PO<inf>4</inf>H)<inf>2</inf>(PO <inf>4</inf>)<inf>2</inf>'. Together they form a unique fingerprint.

## Cite this

Bustamante, A., Mattievich, E., De Amorim, H. S., Vencato, I., & Silveira, M. M. (2005). The Mössbauer spectrum of synthetic hureaulite: Fe<inf>5</inf><sup>2+</sup>(H<inf>2</inf>O)<inf>4</inf>(PO<inf>4</inf>H)<inf>2</inf>(PO <inf>4</inf>)<inf>2</inf>

*Hyperfine Interactions*, 599-603. https://doi.org/10.1007/s10751-006-9326-1