Tables for
Volume B
Reciprocal space
Edited by U. Shumeli

International Tables for Crystallography (2006). Vol. B, ch. 3.1, p. 348   | 1 | 2 |

Section 3.1.3. Length of a vector

D. E. Sandsa*

aDepartment of Chemistry, University of Kentucky, Chemistry–Physics Building, Lexington, Kentucky 40506-0055, USA
Correspondence e-mail:

3.1.3. Length of a vector

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By ([link], the scalar product of a vector with itself is [{\bf v} \cdot {\bf v} = (v)^{2}. \eqno(] The length of v is, therefore, given by [v = (v^{i} v\hskip 2pt^{j} g_{ij})^{1/2}. \eqno(] Computation of lengths in a generalized rectilinear coordinate system is thus simply a matter of evaluating the double summation [v^{i}v\hskip 2pt^{j}g_{ij}] and taking the square root.

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