hexagonal close arrangement

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• Close-packing of spheres — hcp and fcc close packing of spheres In geometry, close packing of spheres is a dense arrangement of equal spheres in an infinite, regular arrangement (or lattice). Carl Friedrich Gauss proved that the highest average density – that is, the… …   Wikipedia

• Hexagonal compact — Empilement compact L empilement compact est la manière d agencer des sphères dans l espace afin d avoir la plus grande densité de sphères, sans que celles ci ne se recouvrent. C est un problème que l on se pose en général en géométrie euclidienne …   Wikipédia en Français

• Kepler conjecture — In mathematics, the Kepler conjecture is a conjecture about sphere packing in three dimensional Euclidean space. It says that no arrangement of equally sized spheres filling space has a greater average density than that of the cubic close packing …   Wikipedia

• Crystal structure — In mineralogy and crystallography, crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid. A crystal structure is composed of a pattern, a set of atoms arranged in a particular way, and a lattice… …   Wikipedia

• Sphere packing — In mathematics, sphere packing problems are problems concerning arrangements of non overlapping identical spheres which fill a space. Usually the space involved is three dimensional Euclidean space. However, sphere packing problems can be… …   Wikipedia

• Empilement compact — L empilement compact est la manière d agencer des sphères dans l espace afin d avoir la plus grande densité de sphères, sans que celles ci ne se recouvrent. C est un problème que l on se pose en général en géométrie euclidienne dans l espace à… …   Wikipédia en Français

• Empilement Compact — L empilement compact est la manière d agencer des sphères dans l espace afin d avoir la plus grande densité de sphères, sans que celles ci ne se recouvrent. C est un problème que l on se pose en général en géométrie euclidienne dans l espace à… …   Wikipédia en Français

• Iddingsite — is an alteration of olivine that consists of a mixture of clay minerals, iron oxides and ferrihydrides. Iddingsite forms from the weathering of basalt in the presence of liquid water and can be described as a phenocryst meaning it has… …   Wikipedia

• metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …   Universalium

• Lennard-Jones potential — Computational physics Numerical analysis  …   Wikipedia

• Dozen — Doz redirects here. For the Afro Asiatic language, see DOZ. Dozens redirects here. For other uses, see Dozens (disambiguation). Group of twelve redirects here. For other uses, see Group of Twelve (disambiguation). A dozen (common abbreviated doz… …   Wikipedia