magnetic pyrites
Americannoun
Example Sentences
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For instance, common iron pyrites, FeS2, is unresponsive, whilst the magnetic pyrites, which varies from 5FeS, Fe2S3, to 6FeS, Fe2S3, and is a sulphide of iron, is responsive both positively and negatively.
From The Chemistry, Properties and Tests of Precious Stones by Mastin, John
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