PREPARATION ET ETUDE PHYSICO-CHIMIQUE D'UNE SERIE DE PHOSPHOSULFATES DE CALCIUM Ca21−x(PO4)14-2x(SO4)2x(0 ≤x≤ 1) PRESENTANT LA STRUCTURE DE L'ORTHOPHOSPHATE TRICALCIQUE ANHYDRE β-Ca3(PO4)2

Study of the system Ca,(AsO,),-CaSO, has led to the preparation of a series of solid solutions whose general formula is [(Ca,, --x 0,,,)(As0,),,~,,(S0,),, O,] with O < x < 1. These solid solutions are isostructural with tricalcium orthoarsenate Ca,(AsO,),. The limit of solubility of sulfate ions in tricalcium orthoarsenate corresponds to the ionic ratio R=SOZ-/AsOZ-=0.167 (corresponding to x = 1 in the general formula). The limit compound, calcium arsenosulfate Ca,,(AsO,),,(SO,),, is characterized by its infrared absorption spectra, crystallographic unit-cell parameter in t h e rhombohedral system a,= 10.78(2) 8, and density [p=3.469(5) g ~m -~] .A mechanism of SO:-ion integration in t h e lattice of tricalcium orthoarsenate is proposed.

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PREPARATION ET ETUDE PHYSICO-CHIMIQUE D'UNE SERIE DE PHOSPHOSULFATES DE CALCIUM Ca_21−x(PO₄)_14-2x(SO₄)_2x(0 ≤x≤ 1) PRESENTANT LA STRUCTURE DE L'ORTHOPHOSPHATE TRICALCIQUE ANHYDRE β-Ca₃(PO₄)₂

Cited by 5 publications

References 12 publications

«Ellestadite»-type anionic [PO4]3– → [SO4]2– substitutions in β-Ca3(PO4)2 type compounds: A new route to design the inorganic phosphors

«Ellestadite»-type anionic [PO4]3– → [SO4]2– substitutions in β-Ca3(PO4)2 type compounds: A new route to design the inorganic phosphors

Isovalent and aliovalent cation substitutions in the anion sublattice of whitlockite-type ferroelectrics Ca9RE(VO4)7 with RE =Y and Yb

Study of the system Ca₃(AsO₄)₂–CaSO₄by solid-state reaction

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PREPARATION ET ETUDE PHYSICO-CHIMIQUE D'UNE SERIE DE PHOSPHOSULFATES DE CALCIUM Ca21−x(PO4)14-2x(SO4)2x(0 ≤x≤ 1) PRESENTANT LA STRUCTURE DE L'ORTHOPHOSPHATE TRICALCIQUE ANHYDRE β-Ca3(PO4)2

Cited by 5 publications

References 12 publications

«Ellestadite»-type anionic [PO4]3– → [SO4]2– substitutions in β-Ca3(PO4)2 type compounds: A new route to design the inorganic phosphors

«Ellestadite»-type anionic [PO4]3– → [SO4]2– substitutions in β-Ca3(PO4)2 type compounds: A new route to design the inorganic phosphors

Isovalent and aliovalent cation substitutions in the anion sublattice of whitlockite-type ferroelectrics Ca9RE(VO4)7 with RE =Y and Yb

Study of the system Ca3(AsO4)2–CaSO4by solid-state reaction

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PREPARATION ET ETUDE PHYSICO-CHIMIQUE D'UNE SERIE DE PHOSPHOSULFATES DE CALCIUM Ca_21−x(PO₄)_14-2x(SO₄)_2x(0 ≤x≤ 1) PRESENTANT LA STRUCTURE DE L'ORTHOPHOSPHATE TRICALCIQUE ANHYDRE β-Ca₃(PO₄)₂

Study of the system Ca₃(AsO₄)₂–CaSO₄by solid-state reaction