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Constantino U., 1997, “Thermoanalytical Study, Phase transitions and dimensional changes of α-Zr (HPO₄ )*H2O Large Crystals.”. J. Solid State Chem., Vol., 132, pp. 17-23.

has been cited by the following article:

• TITLE: The Influence of Agitation Speed on the Morphology and Size Particle Synthesis of Zr(HPO4)2·H2O from Mexican Sand

  AUTHORS: Garcia Rosales Genoveva, Ordónez Regil Enrique, Romero Guzmán Elizabeth Teresita, Ordónez Regil Eduardo

  KEYWORDS: Zirconium sand; Zirconium phosphates; α-ZP surface morphology; α-ZP synthesis.

  JOURNAL NAME: Journal of Minerals and Materials Characterization and Engineering, Vol.6 No.1, June 12, 2007

  ABSTRACT: Mexican zirconium sand has been envisaged like a source of zirconium compounds. The main product obtained is zircon (ZrSiO4), which has a high raw material value. During a mineralogical purification sand process with hydrofluoric acid, a liquor was obtained as the by product. This liquor was dripped over hot phosphoric acid to obtain zirconium hydrogen phosphate Zr(HPO4)2·H2O (α-ZP) which has taken considerably attention due to its wide application. Both products zircon and α-ZP were analyzed as for structure and purity using analytic techniques. X-Ray diffraction revealed that zircon and α-ZP were polycrystalline materials. Scanning Electron Microscopy indicated that α-ZP formed particles and aggregates in different shapes and size distributions depending on the condensing way and the agitation speed. Furthermore, thermogravimetric analysis demonstrated that the α-ZP phases present different hydrated levels. FTIR spectra were obtained to identify the corresponding PO stretching vibration from the α-ZP and the specific surface areas were calculated by BET method.