Assertion: siderite's sulfur | /r/CapableOf | start at 540 °c
Facets:
Source sentences:
text: Thermal decomposition of pyrite into FeS (iron(II) sulfide) and elemental sulfur starts at 540 °C (1,004 °F); at around 700 °C (1,292 °F), p S 2 is about 1 atm.