Assertion: pyrite | /r/CapableOf | change over into magnetic sulphide
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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.