  Recent claim of discovering above-room-temperature superconductivity (Tc
about 400 K) at ambient pressure in copper doped apatite $Pb_{10}\left( PO_4
\right) _6O$ has stimulated world-wide enthusiasm and impulse of motion. A lot
of follow-up works have been carried out with controversial conclusions. To
check whether superconductivity is really present or absent in the material, we
need samples which should have a rather pure phase of $Pb_{10-x}Cu_x\left( PO_4
\right) _6O$. Here we report the characterization results from the
$Pb_{10-x}Cu_x\left( PO_4 \right) _6O$ with a fraction of about 97 wt.%
inferred from the fitting to the x-ray diffraction pattern. The resistivity
measurements show that it is a semiconductor characterized roughly by a ln(1/T)
temperature dependence in wide temperature region without trace of
superconductivity. Magnetization measurements show that it has a general
ferromagnetic signal with a weak superparamagnetic background. Many grains of
the sample show clear interactions with a NbFeB magnet. The detected Cu
concentration is much lower than the expected nominal one and the conduction
may be improved if more Cu atoms are successfully doped into the system. Our
results show the absence of metallicity and superconductivity in
$Pb_{10-x}Cu_x\left( PO_4 \right) _6O$ at ambient pressure, and suggest the
presence of strong correlation effect.
