“The X-ray diffraction (XRD) data for the sample undergoes refinement using the Reflex module in Materials Studio, aligning with the P63/m structure characteris

“The X-ray diffraction (XRD) data for the sample undergoes refinement using the Reflex module in Materials Studio, aligning with the P63/m structure characteristics of apatite, as illustrated in Fig. 4. However, a slight discrepancy is noted in the range of 25–27° and 30-40°, potentially originated from a minor presence of residual oxide. Despite an extended period of roasting under a pure oxygen atmosphere, the interference from cuprous sulfide still persists, attributed to the intentional addition of sulfur elements during synthesis. Complete elimination of this interference remains challenging. In summary, the diamagnetism in CSLA has been investigated via both M-T curves and hysteresis M-H loops, which can be observed up to 250 K. Given the ZFC-FC bifurcation at above 300 K, we think there is still great chance to observe room-temperature superconductivity. The signals in our sample are still extremely weak, so we have to devote efforts to further synthesizing scalable samples with more active components.”