A graphical 2D diffraction pattern, or Ring Pattern, can be produced for every entry in the icdd pdf-4+ database

A graphical 2D diffraction pattern, or Ring Pattern, can be produced for every entry in the ICDD PDF-4+ database.

• A graphical 2D diffraction pattern, or Ring Pattern, can be produced for every entry in the ICDD PDF-4+ database.

Each ring corresponds to a peak (d-spacing and intensity), calculated using the Crystallite Size parameter specified in the ‘Ring Pattern’.

• Each ring corresponds to a peak (d-spacing and intensity), calculated using the Crystallite Size parameter specified in the ‘Ring Pattern’.

• The higher the intensity, the brighter the ring.

The simulation assumes:

• The simulation assumes:

• No preferred orientation in the specimen
• Uniaxial positioning of the detector (transmission geometry with incident beam centered)
• Infinite number of randomly oriented crystallites

There are various preferences used to control how the Ring Pattern is calculated and displayed.

• There are various preferences used to control how the Ring Pattern is calculated and displayed.

The Plot Size controls the detector dimensions (width and height in cm).

• The Plot Size controls the detector dimensions (width and height in cm).

• If the Ring Pattern is not visible on the form, try increasing the Plot Size.

The Camera Length controls the sample-to-detector distance (in cm).

• The Camera Length controls the sample-to-detector distance (in cm).

The Crystallite Size parameter (in Å) affects the broadness of the rings.

• The Crystallite Size parameter (in Å) affects the broadness of the rings.

• Narrow rings correspond to larger Crystallite Sizes.

The Scale Background and Scale Font colors control the appearance of the Ring Pattern.

• The Scale Background and Scale Font colors control the appearance of the Ring Pattern.

The Wavelength of the Ring Pattern can be set using the corresponding preferences.

• The Wavelength of the Ring Pattern can be set using the corresponding preferences.

• Use the Experimental preferences for experimental patterns.
• Use the Calculated preferences for calculated patterns.