greigite
/ˈɡriːɡʌɪt/Mineralogy
noun
A strongly magnetic iron sulphide mineral that occurs as microscopic pink, blue, or black crystals and is found in lake sediments and magnetosomes.
- Greigite is a member of the linnaeite group. Chemical formula: Fe3S4. Crystal system: cubic..
Origin
1960s. From the name of Joseph Wilson Greig, U.S. mineralogist and geochemist + -ite.