Natural Minerals
By increasing order of stability:
- Iron(II) sulfide, FeS, the less stable amorphous form;
- Troilite, FeS, the end member of pyrrhotite;
- Greigite, Fe3S4, analog to magnetite, Fe3O4;
- Pyrrhotite, Fe1-xS (where x = 0 to 0.2), or Fe7S8;
- Mackinawite, Fe1+xS (where x = 0 to 0.1);
- Marcasite, or iron(II) disulfide, FeS2 (orthorhombic);
- Pyrite, or iron(II) disulfide, FeS2 (cubic), the more stable end member.
Read more about this topic: Iron Sulfide
Famous quotes containing the word natural:
“The natural historian is not a fisherman who prays for cloudy days and good luck merely; but as fishing has been styled “a contemplative man’s recreation,” introducing him profitably to woods and water, so the fruit of the naturalist’s observations is not in new genera or species, but in new contemplations still, and science is only a more contemplative man’s recreation.”
—Henry David Thoreau (1817–1862)