In crystallography, the cubic crystal system is the most symmetric of the 7 crystal systems. The system is composed of the three Bravais lattices whose symmetry group is that of a cube. Crystallography (from the Greek words crystallon = solid and graphein = write) is the experimental science of determining the arrangement of atoms in solids. ... In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... In geometry and crystallography, a Bravais lattice is an infinite set of points generated by a set of discrete translation operations. ... The symmetry group of a geometric figure is the group of congruencies under which it is invariant, with composition as the operation. ... Cube may denote one of the following. ...
The three Bravais lattices that form the cubic crystal system are:
simple cubic
body-centered cubic
face-centered cubic
The point groups that fall under this crystal system are listed below, followed by their representations in international notation and Schoenflies notation, and mineral examples. Cubic crystal structure. ... Cubic, body-centered crystal structure. ... Cubic, face-centered crystal structure. ... In crystallography, a crystallographic point group or crystal class is a set of symmetry operations that leave a point fixed, like rotations or reflections, which leave the crystal unchanged. ... In crystallography, a crystallographic point group or crystal class is a set of symmetry operations that leave a point fixed, like rotations or reflections, which leave the crystal unchanged. ... Minerals are natural compounds formed through geological processes. ...
See also: close-packing Galena is a mineral, an ore of lead, lead sulfide (PbS). ... Categories: Mineral stubs | Minerals | Oxide minerals ... The mineral pyrite, or iron pyrite, is iron disulfide, FeS2. ... Sphalerite sample Another sphalerite sample Sphalerite (ZnS) is a mineral that is the chief ore of zinc. ... Close-packing of spheres refers to arranging an infinite lattice of spheres so that they take up the greatest possible fraction of an infinite 3-dimensional space. ...
Ferrite or alpha iron (α-Fe) is a materials science term for iron, or a solid solution with iron as the main constituent, with a bodycentredcubic crystal structure.
In pure iron, ferrite is stable below 910°C. Above this temperature the face-centered cubic form of iron, austenite (gamma-iron) is stable.
Only a very small amount of carbon can be dissolved in ferrite; the maximum solubility is about 0.02wt% at 723°C. This is because carbon dissolves in iron interstitially, with the carbon atoms being about twice the diameter of the interstitial "holes", so that each carbon atom is surrounded by a strong local strain field.
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