𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Determination of Formation Regions of Titanium Phosphates; Determination of the Crystal Structure ofβ-Titanium Phosphate, Ti(PO4)(H2PO4), from Neutron Powder Data

✍ Scribed by Anne Marie Krogh Andersen; Poul Norby; Tom Vogt

Book ID
102606034
Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
377 KB
Volume
140
Category
Article
ISSN
0022-4596

No coin nor oath required. For personal study only.

✦ Synopsis

The formation region of the various types of layered titanium hydrogen phosphate hydrates was investigated. The materials were prepared by hydrothermal methods, treating amorphous titanium phosphate with phosphoric acid (8 to 16 M) in the temperature range 175 to 250°C. The materials obtained were: -Ti(HPO 4 ) 2 • H 2 O, -Ti(PO 4 )(H 2 PO 4 ) • 2H 2 O, and its anhydrous form -Ti(PO 4 )(H 2 PO 4 ). The structure of -Ti(PO 4 ) (H 2 PO 4 ) has been determined by Rietveld powder refinement of high resolution neutron diffraction data. The structure is refined in the monoclinic space group P2 1 /n (No. 14). The unit cell parameters are: a ‫؍‬ 18.9503(4) A > , b ‫)1(7213.6؍‬ A > , c ‫؍‬ 5.1391(1) A > , ‫؍‬ 105.366(2)°; Z ‫؍‬ 4. The final agreement factors were: R p ‫؍‬ 2.9% and R wp ‫؍‬ 3.8%. The structure of -Ti(PO 4 )(H 2 PO 4 ) is built from TiO 6 octahedra linked together by tertiary phosphate (PO 4 ) and dihydrogen phosphate ((OH) 2 PO 2 ) tetrahedra. The layers are held together by hydrogen bonds.

📜 SIMILAR VOLUMES

ChemInform Abstract: Crystal Structure,
ChemInform Abstract: Crystal Structure, Including H-Atom Positions, of Ti2O(PO4)2(H2O)2 Determined from Synchrotron X-Ray and Neutron Powder Data.
✍ M. A. SALVADO; P. PERTIERRA; S. GARCIA-GRANDA; J. R GARCIA; M. T. FERNANDEZ-DIAZ 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 30 KB 👁 1 views

The structure consists of a three-dimensional network of TiO 6 octahedra and PO 4 tetrahedra linked by vertex sharing. The two independent Ti atoms are connected by an oxo-bridge and two independent H 2 O molecules are linked to one type of Ti atoms. -(SALVADO, M. A.;