Assertion: pyrite | /r/CapableOf | loose their sulphur
Facets:
Source sentences:
text: Pyrite and marcasite begin to loose their sulphur and change over into the magnetic sulphide, and finally into the oxides, at a temperature of 370° C, and the roast must be conducted between this point and the ignition point of blende, which is about 600° C. Below 400 to 460 degrees the pyrite does not become thoroughly magnetic and the usual temperature employed is just below the ignition point of blende.