This is a handy companion for people engaged in x-ray or neutron diffraction. It provides an easy way to calculate the diffraction angles or d-spacings for a crystal structure. When two of the parameters of Bragg's Law, λ = 2d sin(θ), are provided, the third is calculated. For example if you know energy and d-spacing then the angle θ is calculated. Also for the loaded crystal structure, it provides atomic positions, calculated values for the Kinematic and Dynamical Integrated Intensities, absorption factor, structure factor, and can further provide plots of the rocking curve, mirror reflectivity, F(000), µ, powder pattern, stereographic projection, Laue pattern, multiple reflections, and 3D model of the unit cell and 1st Brillouin zone. Atomic structure factors for X-rays and Neutrons are included. There is the same functionality on both iPhone and iPad.
Ratings & Reviews
5.0
out of 5
1 Ratings
Added support for Layer Groups, and a few other improvements, this required some small changes to the GUI.
change Version & Build 2.3.3 --> 3.0 on September 30, 2026 3:30pm (EDT) hash 7c091ab iOS
Version 3.0
The developer, Jonathan Tischler, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
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Information
Seller
Jonathan Tischler
Size
12.8 MB
Category
Reference
Compatibility
Requires iOS 15.5 or later.
iPhone Requires iOS 15.5 or later.
iPad Requires iPadOS 15.5 or later.
iPod touch Requires iOS 15.5 or later.
Mac Requires macOS 12.4 or later and a Mac with Apple M1 chip or later.
