Calcium thorium phosphate (Whitlockite-type mineral). Synthesis and structure refinement

Abstract

The crystal structure of a new calcium thorium phosphate has been refined by the full-profile Rietveld method using X-ray powder diffraction data. The sample has been synthesized by the sol-gel technique. The phosphate has been identified by X-ray powder diffraction and IR spectroscopy. The refined composition is represented by the formula Ca10.26Th0.12(PO4)7. The CaO n and PO4 polyhedra are distorted compared to the corresponding polyhedra in the basic compound β-Ca3(PO4)2.

References

Page 1

	Year	Citations
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides R. D. Shannon Acta Crystallographica Section A EngineeringComputational ChemistryChemistryInorganic MaterialInorganic Compound	1976	63.5K
Crystal structure analysis of β-tricalcium phosphate Ca3(PO4)2 by neutron powder diffraction Masatomo Yashima, Atsushi Sakai, Takashi Kamiyama, Journal of Solid State Chemistry Materials ScienceCrystal Structureβ-Tricalcium Phosphate Ca3Crystal Structure AnalysisEngineering	2003	492
Crystallographic studies of the role of Mg as a stabilizing impurity in β-Ca3(PO4)2. The crystal structure of pure β-Ca3(PO4)2 Brian Dickens, L. W. Schroeder, W. E. Brown Journal of Solid State Chemistry Materials ScienceInorganic ChemistryCrystal StructureEngineeringCalcium Aluminate	1974	490
Crystallographic studies of the role of Mg as a stabilizing impurity in β-Ca3(PO4)2. II. Refinement of Mg-containing β-Ca3(PO4)2 L. W. Schroeder, Brian Dickens, W. E. Brown Journal of Solid State Chemistry Materials ScienceInorganic ChemistryMg-containing β-Ca3EngineeringCalcium Aluminate	1977	176
The structure of cerium orthophosphate, a synthetic analogue of monazite Gary W. Beall, L. A. Boatner, D.F. Mullica, Journal of Inorganic and Nuclear Chemistry Inorganic ChemistryEngineeringBiochemistryNatural SciencesChemistry	1981	132
Spallation and fissiogenic xenon and krypton from stepwise heating of the Pasamonte achondrite; The case for extinct plutonium 244 in meteorites; Relative ages of chondrites and achondrites C. M. Hohenberg, Miner N. Munk, J. H. Reynolds Journal of Geophysical Research Atmospheres EngineeringPetrologyMeteorite ImpactExplosionsGeochronology	1967	119
Crystal Structure of Synthetic Mg-Whitlockite, Ca<sub>18</sub>Mg<sub>2</sub>H<sub>2</sub>(PO<sub>4</sub>)<sub>14</sub> R. Gopal, C. Calvo, J. Ito, Canadian Journal of Chemistry Materials ScienceInorganic ChemistryCrystal StructureEngineeringCrystal Material	1974	113
Design of inorganic compounds with tetrahedral anions Bogdan I. Lazoryak Russian Chemical Reviews Materials ScienceInorganic ChemistryInorganic CompoundsCrystal StructureEngineering	1996	111
Crystal Structures and Characterization of Ca9Fe(PO4)7and Ca9FeH0.9(PO4)7 Bogdan I. Lazoryak, Vladimir A. Morozov, Alexei А. Belik, Journal of Solid State Chemistry Materials ScienceInorganic ChemistryCrystal StructureEngineeringCrystal Structures	1996	71
High-Temperature Phase Transition in the Whitlockite-Type Phosphate Ca9In(PO4)7 Vladimir A. Morozov, Alexei А. Belik, S. Yu. Stefanovich, Journal of Solid State Chemistry Materials ScienceEngineeringHigh-temperature Phase TransitionPhysical ChemistryCalcium Aluminate	2002	70

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