hexagonal unit cell

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• hexagonal system — ▪ crystallography       one of the principal categories of structures to which a given crystalline solid can be assigned. Components of crystals in this system are located by reference to four axes three of equal lengths set at 120° to one… …   Universalium

• Hexagonal crystal system — In crystallography, the hexagonal is one of the 7 crystal system, it contains 7 point groups . It has the same symmetry as a right prism with a hexagonal base. There is only one hexagonal Bravais lattice, which has six atoms per unit… …   Wikipedia

• hexagonal close-packed — the unit cell is of hexagonal geometry and is generated by the stacking of close packed planes of atoms …   Mechanics glossary

• 24-cell — Schlegel diagram (vertices and edges) Type Convex regular 4 polytope Schläfli symbol {3,4,3} t …   Wikipedia

• Place cell — Infobox neuron neuron name = Place cell image neuron = Hippocampal pyramidal cell.png caption neuron = A hippocampal pyramidal cell location = Hippocampus function = Spatial memory: fires when animal is in a particular location neurotransmitter …   Wikipedia

• Lonsdaleite — Hexagonal diamond or commonly Lonsdaleite (named in honour of Kathleen Lonsdale ) is an allotrope of carbon with a hexagonal lattice, believed to form when meteoric graphite falls to Earth. The great heat and stress of the impact transforms the… …   Wikipedia

• Diamond cubic — Unit cell of the diamond cubic crystal structure …   Wikipedia

• Crystal structure of boron-rich metal borides — Two single crystals of YB66 (1 cm diameter) grown by floating zone technique using (100) oriented seeds. In the top crystal, the seed (left from the black line) has same diameter as the crystal. In the bottom crystal (sliced), the seed is much… …   Wikipedia

• X-ray crystallography — can locate every atom in a zeolite, an aluminosilicate with many important applications, such as water purification. X ray crystallography is a method of determining the arrangement of atoms within a crystal, in which a beam of X rays strikes a… …   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

• crystal — crystallike, adj. /kris tl/, n., adj., v., crystaled, crystaling or (esp. Brit.) crystalled, crystalling. n. 1. a clear, transparent mineral or glass resembling ice. 2. the transparent form of crystallized quartz. 3. Chem., Mineral. a solid body… …   Universalium