Microhardness studies on as-grown faces of NaClO3 and NaBrO3 crystals

These results suggest that the load independent values are around 135 and 236 kg/mm2 for NaClO3 and NaBrO3, respectively

K. Kishan Rao; V. Surender; B. Saritha Rani

2007

Scholarcy highlights

  • NaClO3 and NaBrO3 are isomorphous crystallizing in enantiomorphic point group 23
  • Considerable amount of work is reported on physical properties like elastic constants, thermal expansion etc but meagre amount of information is available on hardness, which is an important strength parameter
  • These results suggest that the load independent values are around 135 and 236 kg/mm2 for NaClO3 and NaBrO3, respectively
  • The structure of NaClO3 and NaBrO3 is not as simple as alkali halides but it can be viewed as consisting of Na+ and ClO3–/BrO3– ions. From this approximation hardness values are estimated from C44 values
  • The obtained hardness values are 162 and 227 kg/mm2 for NaClO3 and NaBrO3, respectively and they are in fair agreement with the present experimental results
  • If we look at unit cell dimensions of NaClO3 and NaBrO3, the latter one should be softer
  • The studies of thermal expansion, elastic constants and the data on melting points suggest that NaBrO3 structure is stronger than NaClO3

Need more features? Save interactive summary cards to your Scholarcy Library.