Synthesis and crystal structure of AlH2P3O10·2H2O; a new structure-type for layered acid phosphates

Abstract

The crystal structure of the layered acid phosphate, AlH2P3O10.2H2O, has been determined and provides a new structure-type for a series of metal phosphates with interlamellar regions likely to be highly suited to intercalation behaviour.

Crystal Structure of Gallium and Chromium Salts Belonging to the Family Miiih2p3o10·2h2o (Form I)

“…Room temperature X-ray powder diffraction patterns for GaH 2 In the Rietveld refinement, a Marsh-Dollase 11,12 correction of intensities for preferred orientation (PO) of grains in specimens (as implemented in FULLPROF program) was applied. It was found during the investigation, that only the use of both needle-like and plate-like particle models for PO correction allowed to obtain acceptable agreement of calculated and observed intensities.…”

“…The first structural data appeared only in 2006, when S.K. Rushi et al 2 reported the crystal structure of AlH 2 P 3 O 10 ·2H 2 O. Although a single crystal of the aluminium salt, used for X-ray analysis, was of rather low quality, the obtained data are of great importance because they allow to determine crystal structure of other compounds of the family from powder diffraction data by using Rietveld refinement.…”

Ion exchange properties of aluminium triphosphate

“…The exotic cations Cd and Co 2+ have been inserted experimentally in the alluaudite-type compounds Na 2 Cd 2 M 3+ (PO 4 ) 3 (M 3+ = Fe 3+ , Ga, Cr) [4] and M + Co 2+ 3 (PO 4 )(HPO 4 ) 2 (M + = Ag, Na) [5,6]. Since alluaudite is a key mineral in the genetic evolution affecting the Fe-Mn-bearing phosphates minerals, it is of interest to investigate the crystal chemistry of the divalent cation in the alluaudite structure.…”

“…The new thallium(I) ortho-thiophosphates TlMPS 4 (M = Sr, Pb) were prepared applying a stoichiometric mixture of P 2 S 5 , MS, S, and Tl 2 S at high temperatures. The compound crystallizes in the orthorhombic space group Pnma and is isostructural with TlEuPS 4 [1].…”

“…The bond valence analysis method (BVM) is used to determine where is pointing the Pb 6s 2 lone pair. [4] has shown that it possesses similar structural features to the zirconium phosphates but little research has yet been undertaken into its ion exchange properties. Here we present our synthetic and structural studies on the ion exchange properties of AlH 2 P 3 O 10 .2H 2 O, focusing on Li, Na and Cs exchanges.…”