High pressure differential thermal analysis (DTA) and crystal growth of α‐HgS

Differential Thermal Analysis (DTA) of HgS was performed in high pressure gas apparatus up to 21 kbar and temperatures up to 1000 °C. The zinc blende–cinnabar, cinnabar–liquid, and zinc blende–liquid coordinates are: p=16.6 kbar and T=890 °C. For the first time α‐HgS (cinnabar) was crystallized from the melt. The obtained ingots (size 4×5×30 mm) consisted of few single crystal grains. Good crystal quality was confirmed by X‐ray analysis.