Add term: x-ray powder diffraction in transmission geometry

[kara-mela]

New term label (required)

x-ray powder diffraction in transmission geometry

Definition (required)

x-ray diffraction of a powder sample (many small, randomly oriented crystals) for a beam that passes straight through the sample (transmission geometry)

Position in the hierarchy or the parent class (required)

subclass of x-ray powder diffraction (PaNET01101)
subclass of transmission geometry (tbd)

Synonyms

pXRD in transmission geometry

Cross-references

Contemporary Advances in the Use of Powder X-Ray Diffraction for Structure Determination, section 5.5
The MYTHEN detector for X-ray powder diffraction experiments at the Swiss Light Source

Motivation

The diffractometer manufacturer STOE wants to add technique specifiers to their raw data. The distinction of the two x-ray powder diffraction modes (transmission and reflection) is important to accomplish this task.

Further comments

Update definition of x-ray powder diffraction

powder = many small randomly oriented crystals; several of those crystals will always be in the correct position for diffraction according to Bragg's law; for perfect powders and rotated samples: 1D projection of 3D reciprocal space due to rotational symmetry of the diffraction pattern; data often as intensity I over diffraction angle 2theta, several methods possible: Debye-Scherrer, Guinier (transmission), Bragg-Brentano (reflection)

Add transmission geometry

as a specifier and as a technique