The hexagonal grain of iron sulfide may be removed for analysis to reveal the diamond's age. Hexagonal Grain of Iron Sulfide Below a Diamond's Surface Surrounded by a Black Rim Hexagonal Grain of ...

Pyrite, chemically known as iron sulfide (FeS₂), is one of Earth ... the shape of pyrite crystals is dictated by its atomic ...

Lianjie Man and colleagues conducted high-pressure-temperature laboratory experiments to determine the crystal structure and density of the iron-sulfide phase in Mars's core. The authors suggest ...

Given the seeming paucity of moisture in the leftover remains of Earth's building blocks, planetary scientists have long ...