Read/write :ref:`XlTickMark` value specifying the type of minor tick
        mark for this axis.

def minor_tick_mark(self):
        """
        Read/write :ref:`XlTickMark` value specifying the type of minor tick
        mark for this axis.
        """
        minorTickMark = self._element.minorTickMark
        if minorTickMark is None:
            return XL_TICK_MARK.CROSS
        return minorTickMark.val