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  Indian J Med Microbiol
 

Figure 5: (a) XRD pattern of NHA nanopowder, (b) NHA and CaF2 ball milled for 2 h, NHA and CaF2 ball milled for 4 and 6 h, mixture of NHA and CaF2 ball milled for 8 h

Figure 5: (a) XRD pattern of NHA nanopowder, (b) NHA and CaF<sub>2</sub> ball milled for 2 h, NHA and CaF<sub>2</sub> ball milled for 4 and 6 h, mixture of NHA and CaF<sub>2</sub> ball milled for 8 h