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the concept of lattice is very (too!) often misinterpreted outside crystallography. By definition, the lattice points are all identical, that is each lattice point has identical surroundings to all others. In a honeycomb pattern you can distinguish 2 different sets of points, the red and the blue ones in the figure. So honeycomb pattern is actually a 2-...


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I guess that 1.081 refers to the distance length (in Angstrom) separating the C and N atoms. You obtain this value by applying by using the values listed in the table; this is quite tedious, takes some time and require quite good knowledge about crystallography. Otherwise (and much more easy), you can use the crystallographic data listed in the table to ...


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You have to take care about the definition of lattice and crystal structure. Quoting your text "An ideal crystal is constructed by the infinite repetition of identical groups of atoms. A group is called the basis. The set of mathematical points to which the basis is attached is called the lattice". So the crystal structure is constituted of a basis ...


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What is the difference between Hexagonal Close Packing (HCP) structures and the hexagonal crystal Bravais lattice? HCP structures have a lattice that is classified as hexagonal Bravais lattice. There are many other structures that have a hexagonal Bravais lattice but are not HCP structures. The HCP structure contains a single type of atom closely packed in ...


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2 brief observations about the answer by Mitchell. a hexagonal lattice does not exist in 2-dimensions. By definition,A lattice is an infinite array of points in space, in which each point has identical surroundings to all others. For example consider a 2d cubic lattice; now, for example, choose one of the lattice point (we call it point A) and connect it ...


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