You need a /50 clock divider, but I fear it doesn't work with CD4060, because the propagation delay is too large to use it with the
required feedback logic at 5 MHz. It possibly can work at 15V supply voltage.
100 kHz "tuning fork" crystals (same package as 32 kHz watch crystals) are standard parts. If you prefer a didvided 5 MHz clock,
the clock divider must be able to work at 5 MHz.
still i dosn't solve this problem. Plz if u have any circuit of crystal oscillator that generate 100 khz. plz send me the link or upload the circuit.....