Skip to main content
SpringerLink
Log in

Thermal investigations on phase transformations of Syrian phosphorite: Part I

  • Published:
Journal of Thermal Analysis and Calorimetry Aims and scope Submit manuscript

Abstract

Syrian phosphorite is subjected to mechanochemical activation carried out in planetary mill. Some phase transformations are ascertained by means of powder XRD and thermal analyses. They reveal as partial transformation of carbonate fluorine apatite into carbonate hydroxyl fluorine apatite and formation of Ca(PO3)2, as well. The solubility of the activated sample in 2% citric acid is increased as a result of these changes.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Abbreviations

A:

Non-activated Syrian phosphorite

B:

Activated for 1,800 s Syrian phosphorite with 20 mm milling bodies of non-alloy steel

C:

Activated for 1,800 s Syrian phosphorite with 20 mm milling bodies of Cr–Ni alloy steel

C-F-Ap-Ca10(PO4)6F2-2x(CO3)x :

Carbonate fluorine apatite

References

  1. Petkova V, Yaneva V. Thermal behavior and phase transformations of nanosized apatite (Syria). J Therm Anal Calorim (in press).

  2. Yaneva V, Petrov O, Petkova V. Structural and spectroscopic studies of the nanosize appatite (Syrian). Mater Res Bull. 2009;44:693–9.

    Article  CAS  Google Scholar 

  3. Chaikina MV. In: Avvakumov EG, editor. Mechanochemistry of natural and synthetic apatites. Novosibirsk: Publishing house of SB RAS, Branch “GEO”; 2002. pp. 11–5; 105–7; 114–5; 139 (in Russian).

  4. Tõnsuaadu K, Rimm K, Veiderma M. Composition and properties of thermophosphates from apatite and aluminosilicates. Phosphorus Sulfur Silicon Related Elements. 1993;84(1–4):73–81.

    Article  Google Scholar 

  5. Chrisis Tacker R. Carbonate in igneous and metamorphic fluorapatite: two type A and two type B substitutions. Amer Mineralogist. 2008;93:168–76.

    Article  Google Scholar 

  6. Bianco Al, Cacciotti Il, Lombardi M, Montanaro L, Gusmano G. Thermal stability and sintering behaviour of hydroxyapatite nanopowders. J Therm Anal Calorim. 2007;88:237–43.

    Article  CAS  Google Scholar 

  7. Tõnsuaadu K, Peld M, Bender V. Thermal analysis of apatite structure. J Therm Anal Calorim. 2003;72(1):363–71.

    Article  Google Scholar 

  8. Lafon JP, Champion E, Bernache-Assollant D, Gibert R, Danna AM. Thermal decomposition of carbonated calcium phosphate apatites. J Therm Anal Calorim. 2003;73:1127–34.

    Article  Google Scholar 

  9. Ivanova TI, Frank-Kamenetskaya OV, Kol’tsov AB, Ugolkov VL. Crystal structure of calcium-deficient carbonated hydroxyapatite. J Solid State Chem. 2001;160:340–9.

    Article  CAS  Google Scholar 

  10. Tõnsuaadu K, Peld M, Leskela T, Mannonen R, Niinisto L, Veiderma M. A thermoanalytical study of synthetic carbonate-containing apatites. Thermochim Acta. 1995;256:55–65.

    Article  Google Scholar 

  11. Trojan M, Brandová D. Synthesis of binary cyclo-tetraphosphates by thermal decomposition of polyphosphate glasses. J Therm Anal Calorim. 1990;36:2075–8.

    Article  CAS  Google Scholar 

  12. Trojan M, Šulcová P, Sýkorová L. Thermal analysis of Ba(II)–Sr(II) cyclo-tetraphosphates(V). J Therm Anal Calorim. 2002;68:75–9.

    Article  CAS  Google Scholar 

  13. Dohnalová Ž, Šulcová P, Trojan M. Synthesis and characterization of LnFeO3 pigments. J Therm Anal Calorim. 2008;91:559–63.

    Article  Google Scholar 

  14. Petkova V, Pelovski Y, Dombalov I, Tonsuaadu K. Thermochemical investigations of natural phosphate with ammonium sulphate additive. J Therm Anal Calorim. 2005;80:701–8.

    Article  CAS  Google Scholar 

  15. Petkova V, Pelovski Y, Dombalov I, Kostadinova P. Influence of triboactivation conditions on the synthesis in natural phosphate-ammonium sulphate system. J Therm Anal Calorim. 2005;80:709–14.

    Article  CAS  Google Scholar 

Download references

Acknowledgement

The authors thank the National Fund “Scientific research” of the Ministry of Education for the financial support (project DOO2-104).

Author information

Authors and Affiliations

  1. Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Sofia, “Academic G. Bonchev” Str., bl.107, 1113, Sofia, Bulgaria

    V. Petkova

  2. Technical University––Varna, 1 Studentska Str, 9010, Varna, Bulgaria

    V. Yaneva

Authors
  1. V. Petkova
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. V. Yaneva
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to V. Petkova.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Petkova, V., Yaneva, V. Thermal investigations on phase transformations of Syrian phosphorite: Part I. J Therm Anal Calorim 100, 51–56 (2010). https://doi.org/10.1007/s10973-009-0187-0

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10973-009-0187-0

Keywords

Search

Navigation