Model – D8Venture (Bruker)
The D8 VENTURE hosts the setup in a spacious enclosure that provides room for rotating anode, liquid metal jet and dual wavelengths solution. All systems feature the revolutionary PHOTON II CPAD detector.
The D8 VENTURE offers highest experimental flexibility, with excellent sample accessibility and visibility. The absolutely open design protects your investment with maximum flexibility for future extensions
Principle:-
Let us consider an X-ray beam incident on a pair of parallel planes P1 and P2, separated by an inter-planar spacing d.
The two parallel incident rays 1 and 2 make an angle (THETA) with these planes. A reflected beam of maximum intensity will result if the waves represented by 1’ and 2’ are in phase. The difference in path length between 1 to 1’ and 2 to 2’ must then be an integral number of wavelengths, (LAMBDA). We can express this relationship mathematically in Bragg’s law.
2d*sin T = n * ?
The process of reflection is described here in terms of incident and reflected (or diffracted) rays, each making an angle THETA with a fixed crystal plane. Reflections occurs from planes set at angle THETA with respect to the incident beam and generates a reflected beam at an angle 2-THETA from the incident beam.
The possible d-spacing defined by the indices h, k, l are determined by the shape of the unit cell. Rewriting Bragg’s law we get :
sin T = ?/2d
Therefore the possible 2-THETA values where we can have reflections are determined by the unit cell dimensions. However, the intensities of the reflections are determined by the distribution of the electrons in the unit cell. The highest electron density are found around atoms. Therefore, the intensities depend on what kind of atoms we have and where in the unit cell they are located.
Planes going through areas with high electron density will reflect strongly, planes with low electron density will give weak intensities.
Usage:
1Pharmaceutical Development: Used to analyze molecular structures of compounds to optimize drug formulation
2 Coordination and Organic Chemistry: Structural determination of compounds
3Biomacromolecules: SCXRD for High-Resolution 3D Structural Insights