Difference between revisions of "D centred cell"
From Online Dictionary of Crystallography
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| − | The '''D centred cell''' is used for the rhombohedral description of the hexagonal lattice. Six right-handed ''D'' | + | The '''D centred cell''' is used for the rhombohedral description of the hexagonal lattice. Six right-handed ''D'' cells with basis vectors of equal length are obtained from the ''hP'' cell by means of one of the following transformation matrices: |
''D''<sub>1</sub>: 10-1/01-1/111 ''D''<sub>2</sub>: -101/0-11/111 | ''D''<sub>1</sub>: 10-1/01-1/111 ''D''<sub>2</sub>: -101/0-11/111 | ||
Revision as of 13:03, 30 November 2016
Maille centrée D (Fr); Cella centrata D (It); D 複合単位胞 (Ja).
The D centred cell is used for the rhombohedral description of the hexagonal lattice. Six right-handed D cells with basis vectors of equal length are obtained from the hP cell by means of one of the following transformation matrices:
D1: 10-1/01-1/111 D2: -101/0-11/111
the other four D cells are obtained by cyclic permutation of the basis vectors.
The resulting hD cell has centring nodes at 1/3,1/3,1/3 and 2/3,2/3,2/3
See also
- Centred lattices
- H centred cell
- Section 4.3.5.3 in the International Tables for Crystallography, Volume A
- Chapter 5 in the International Tables for Crystallography, Volume A