International
Tables for
Crystallography
Volume A
Space-group symmetry
Edited by Th. Hahn

© International Union of Crystallography 2006
International Tables for Crystallography (2006). Vol. A. ch. 1.1, p. 2

Section 1.1.4. Functions

Th. Hahna*

a Institut für Kristallographie, Rheinisch-Westfälische Technische Hochschule, Aachen, Germany
Correspondence e-mail: hahn@xtal.rwth-aachen.de

1.1.4. Functions

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Printed symbol Explanation
ρ ( xyz ) Electron density at the point x, y, z
P ( xyz ) Patterson function at the point x, y, z
F ( hkl ) ; or F Structure factor (of the unit cell), corresponding to the Bragg reflection hkl
| F ( hkl ) | ; or |F| Modulus of the structure factor F(hkl)
α ( hkl ) ; or α Phase angle of the structure factor F(hkl)








































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