BACKGROUND The substitution of Ca(2+) in Ca-hydroxylapatite by toxic Cd(2+) can cause the forming of Cd-hydroxylapatite and is a significant issue in a great variety of research areas, which hence needs an understanding of the essential physicochemical characteristics. Unfortunately, the solubility product and thermodynamic data for Cd-hydroxylapatite in water under a variety of conditions now ...

TO020 – Figure 1 Abstract TO020 – Figure 2 plot identified 30/55 centres within 2sd from the UK mean for % patients achieving PO4<1.8mmol/L but also outlying centres, 7 units outside the 99.9% CIs and 18 centres between the 95%-99.9% CIs. The Monte Carlo analysis (Figure 2) showed marked uncertainty surrounding unit ranking e.g. Bristol, actual rank 20th (CI 10th-32nd) due to a large % of units...

The effects of Sr doping on the structural properties Na2BaCo(PO4)2, a spin-1/2 triangular-lattice antiferromagnet as quantum spin liquid candidate, are investigated by complementary x-ray and neutron powder diffraction measurements. It is found that in Na2Ba1−xSrxCo(PO4)2 (NBSCPO), trigonal phase (space group P3̅m1) with perfect triangular lattice Co2+ ions structurally stable when level below ...

A new vanadium oxide, potassium bis-(dioxovanad-yl) phosphate, β-K(VO2)2(PO4), has been synthesized by a solid-state reaction. In the title compound, the [V2PO8] framework is built up from infinite pyramidal [V2O8]∞ and [VPO7]∞ chains linked together by V-O-P bridges, leading to a three-dimensional framework which delimits two types of inter-secting tunnels running along [100] and [010] in whic...

Single crystals of the title compound, tris-odium divanadium(III) tris-(orthophosphate), were grown from a self-flux in the system Na(4)P(2)O(7)-NaVP(2)O(7). Na(3)V(2)(PO(4))(3) belongs to the family of NASICON-related structures and is built up from isolated [VO(6)] octa-hedra (3. symmetry) and [PO(4)] tetra-hedra (.2 symmetry) inter-linked via corners to establish the framework anion [V(2)(PO...

The solid solution, sodium [iron(III)/manganese(II)] tris-(orthophosphate), Na₃.₄Mn₀.₄Fe₁.₆(PO₄)₃, was obtained using a flux method. Its crystal structure is related to that of NASICON-type compounds. The [(Mn/Fe)₂(PO₄)₃] framework is built up from an (Mn/Fe)O₆octa-hedron (site symmetry 3.), with a mixed Mn/Fe occupancy, and a PO₄ tetra-hedron (site symmetry .2). The Na⁺ cations are distributed...

Iron (Fe) cycling exerts strong control on the mobility and bioavailability of key nutrient phosphate (PO4) in soils sediments. Coprecipitation PO4 is known to alter structure Fe (oxyhydr)oxides (FeOx), however environmental fate PO4-bearing FeOx not well-understood. Here, with 9 mol% coprecipitated were prepared by Fe(III) hydrolysis Fe(II) oxidation presence dissolved PO4, addition pure synth...

Iron (III) oxides are ubiquitous in near-surface soils and sediments and interact strongly with dissolved phosphates via sorption, co-precipitation, mineral transformation and redox-cycling reactions. Iron oxide phases are thus, an important reservoir for dissolved phosphate, and phosphate bound to iron oxides may reflect dissolved phosphate sources as well as carry a history of the biogeochemi...