Thermal Transformation of Indigenous Diaspore

Authors

  • Muhammad Ashraf Kamal University of Karachi, Karachi, Pakistan
  • Syed Mumtaz Danish Naqvi University of Karachi, Karachi, Pakistan
  • Syed Mohib Raza Kazmi University of Karachi, Karachi, Pakistan
  • Kashif Riaz University of Karachi, Karachi, Pakistan
  • Shaikh Mohiuddin University of Karachi, Karachi, Pakistan

DOI:

https://doi.org/10.6000/1927-5129.2015.11.20

Keywords:

 Diaspore, Corundum, TGA, XRD.

Abstract

Indigenous diaspore is a high density hard mineral. It becomes harder on heating up to 550oC. The dispore has been characterized thermally by thermal gravimetric analysis and x-ray diffraction. Results show that the indigenous mineral increases its density after heating at various temperatures for 1 hour. Increase in density points out the increase in hardness due to the formation of a more crystalline compact material corundum using as abrasive.

References

Kazmi AH, Abbas SG. Metallogency and mineral deposits of Pakistan. Islamabad, Pakistan: Orient Petroleum 2001.

Deer WA, Howie RA, Zussman J. An introduction to the rock forming minerals. 2nd ed., Longman Group UK Limited 1992; p. 696.

Klein C, Hurlbut CS. Manual of Mineralogy, Wiley, 20th ed. 1985; p. 318.

Kirk O. Encyclopedia of chemical technology. John Wiley & Sons, Inc., 4th ed., 2006; Vol. 2: p. 230.

Wefers K. Metall 1967; 21: 423-431.

Hatipoglu M, Helvac? C, Chamberlain SC, Babal?k H. Mineralogical characteristics of unusual ‘‘Anatolian” diaspore (zultanite) crystals from the Ilbirdag?? diasporite deposit, Turkey. J Afr Earth Sci 2010; 57: 525-541. http://dx.doi.org/10.1016/j.jafrearsci.2010.01.002

Wefers K, Misra C. Oxides and Hydroxides of Aluminum. Alcoa Laboratories. Aluminum Company of America 1987; p. 41.

Földvari M. Measurement of different water species in minerals by means of thermal derivatography. In: Smykatz-Kloss W, Warne SSJ, Eds. Thermal Analysis in Geosciences. Springer-Verlag, Berlin 1991; p. 453.

Tsuchida T, Kodaira K. Hydrothermal synthesis and characterization of diaspore, ?-Al2O3.H2O. J Mater Sci 1990; 25: 4423-4426. http://dx.doi.org/10.1007/BF00581103

Downloads

Published

2015-01-05

How to Cite

Muhammad Ashraf Kamal, Syed Mumtaz Danish Naqvi, Syed Mohib Raza Kazmi, Kashif Riaz, & Shaikh Mohiuddin. (2015). Thermal Transformation of Indigenous Diaspore. Journal of Basic & Applied Sciences, 11, 143–145. https://doi.org/10.6000/1927-5129.2015.11.20

Issue

Section

Chemistry