Calidris Introduction

Calidris, based in Sweden, was founded by Prof. Sven Hovmöller (Stockholm university) whos main lines of research includes electrom crystallorgaphy, Quasi crystals and approximants, software development for electron microscopy image processing and quantification of electron diffraction patterns.

He has developed a few software packages that provide solutions for electron microscopy and electron diffraction.





Calidris products

CRISP crystallographic image processing of electron micrographs.
CRISP allows processing of electron microscopy images both from inorganic and from biological specimens. Functions: Fourier transforms, correcting astigmatism and defocus in CTF, exit wave reconstruction from a single image, crystallographic symmetry averaging and more.

ELD  quantitative information from electron diffraction patterns
Single crystal spot patterns and powder ring patterns are indexed and quantified. Add on PhIDO for chemical identification and determination of zone axis.

Trice  determine unit cell dimensions from two or more SAED electron diffraction patterns.
The input for Trice is positions of diffraction spots, as found by ELD, plus the relative orientations of the SAED patterns. The reciprocal lattice can be rotated and animated.

Triple merge and scale 3D ED data, with full treatment of the 230 space groups.
Merge exposure series or different zone axes, using data from ELD. Merge symmetry-related reflections for all 230 space groups. The output can be used for example in standard programs for X-ray crystallography for solving structures by Direct Methods or for structure refinement.

PhIDO for phase identification and zone axis determination.
Using a database of compounds, compiled by the user, PhIDO can identify the compound and [uwz] zone axis from an electron diffraction pattern, quantified by ELD.

 Please click on the software package title (underline) to know more about the package. This will take you to Calidris website.

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