Journal of Materials Science

, Volume 17, Issue 5, pp 1355–1358 | Cite as

Microhardness studies in mixed alum crystals

  • P. K. Sharma
  • K. G. Bansigir


The microhardness of mixed alum crystals of various compositions, (NH4)1−xKxAl(SO4)2: 12H2O, has been determined. It is found that the microhardness varies non-linearly with composition, attaining its highest value for a crystal having nearly equimolar concentration. The observed behaviour is explained using the Kataoka and Yamada model.


Polymer Equimolar Concentration Alum Crystal Microhardness Study Yamada Model 
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Copyright information

© Chapman and Hall Ltd 1982

Authors and Affiliations

  • P. K. Sharma
    • 1
  • K. G. Bansigir
    • 1
  1. 1.School of Studies in PhysicsJiwaji UniversityGwaliorIndia

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