 and will r solve similarly unless there are gross irregularities 

Companion paper here with description of synthesis:

A material called LK-99, a modified-lead apatite crystal structure with the
composition Pb$_{10-x}$Cu$_x$(PO$_4$)$_{6O}$ ($0.9<x<1.1$), has been
synthesized using the solid-state method. The material exhibits the Ohmic metal
characteristic of Pb(6s1) above its superconducting critical temperature,
$…