Research source candidate · Not admitted
Jain, copper(I) sulfide phase transition
Dossier reference LK-S19
Authored research source candidate. Not yet a governed Counterpedia source.
Found in
- demo-corpus-wave2 / lk-99-demo-corpus-dossier-v0-3
Authored authority / posture: unrefereed analysis preprint, not a new synthesis or measurement. Identifies the known solid–solid transition of bulk Cu₂S at 104 °C (about 377 K) from the ordered low-temperature phase to the high-temperature superionic phase, compares digitized resistivity curves of LK-99 (from the developers' report, which places a jump at 104.8 °C) and of bulk copper(I) sulfide, and notes a λ-shaped heat-capacity feature consistent with that transition. Concludes that validation of LK-99 would require copper(I) sulfide-free samples.
Authored priority: P1
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