Yet another superconductor market. Criteria:

• "Room temperature" (above 0C)

• "ambient pressure" (below 1 megapascal, i.e. less than 10 atmospheres)

• is proven to be a superconductor of some classification

• is either NOT CuO25P6Pb9 or is a different isomer or allotrope than the synthesized material called "LK-99"

• nonetheless is clearly based on the strategy of combining lanarkite with copper phosphide and baking it, using at least 3 of 4 of lead oxide, lead sulfate, copper, and phosphorus, at no less than 500C

Resolution is decided independently of whether LK-99 is proven to have superconducting properties.