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The mineral pyrite (/ ˈ p aɪ r aɪ t / PY-ryte), [6] or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S 2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral .
Sulfide mineral, pyrite group: Formula (repeating unit) MnS 2: IMA symbol: Hr [1] Strunz classification: 2.EB.05a: Crystal system: Cubic: Crystal class: Diploidal (m 3) H–M symbol: (2/m 3) Space group: Pa 3: Unit cell: a = 6.107 Å; Z = 4: Identification; Formula mass: 119.07 g/mol: Color: Reddish brown or brownish black: Crystal habit ...
The group is named for its most common member, pyrite (fool's gold), which is sometimes explicitly distinguished from the group's other members as iron pyrite. Pyrrhotite (magnetic pyrite) is magnetic, and is composed of iron and sulfur , but it has a different structure and is not in the pyrite group.
Sperrylite is a platinum arsenide mineral with the chemical formula PtAs 2 and is an opaque metallic tin white mineral which crystallizes in the isometric system with the pyrite group structure. It forms cubic, octahedral or pyritohedral crystals in addition to massive and reniform habits.
The type of bonds found in the Pyrite group is covalent, but not in penroseite. For example, pyrite FeS 2, which has the same structure as penroseite and is thought to have similar coordination, has one Fe atom surrounded by six atoms of S, an octahedral coordination. On the other hand, the S atom is surrounded by 4 Fe atoms in a tetrahedral ...
Materials rich in sulfur CuS x where x~ 1.1- 1.2 do exist, but they exhibit "superstructures", a modulation of the hexagonal ground plane of the structure spanning a number of adjacent unit cells. [6] This indicates that several of covellite's special properties are the result of molecular structure at this level.
Laurite is an opaque black, metallic ruthenium sulfide mineral with formula: RuS 2. It crystallizes in the isometric system. It is in the pyrite structural group. Though it's been found in many localities worldwide, it is extremely rare. Laurite has a Mohs hardness of 7.5 and a specific gravity of 6.43.
Galena with baryte and pyrite from Cerro de Pasco, Peru; 5.8 cm × 4.8 cm × 4.4 cm (2.3 in × 1.9 in × 1.7 in) Galena is the main ore of lead , used since ancient times, [ 6 ] since lead can be smelted from galena in an ordinary wood fire. [ 7 ]