powder technique
Noun: A method used in analytical chemistry and mineralogy to identify the crystalline structure of a solid material. The technique involves exposing a finely powdered sample to a beam of X-rays and analyzing the resulting diffraction pattern, which acts as a unique fingerprint for the substance.
The term "powder technique" is used specifically in scientific contexts, particularly in materials science, geology, and chemistry, to describe this standard identification procedure.
- Noun:
- The mineral's composition was confirmed using the powder technique.
- In the lab, we learned how the powder technique can distinguish between different crystalline forms of the same compound.
- "X-ray powder technique": A more precise term often used synonymously, emphasizing the use of X-rays.
- The X-ray powder technique is essential for phase analysis in metallurgy.
- Powder diffraction: A closely related term, often used interchangeably with "powder technique," that focuses on the diffraction phenomenon itself.
- The powder diffraction pattern provided conclusive evidence.
- X-ray powder diffraction (XRPD): The full, formal name for the technique.
- Debye-Scherrer method: A historical name for the same technique, named after its developers.
- X-ray diffraction analysis (for powders): A broader term that includes this technique.
- Powder method: A less common, abbreviated synonym.
This is a technical, compound noun. The core concept is the technique or method itself. The "powder" refers to the required physical state of the sample (finely ground), which is crucial for obtaining a representative diffraction pattern from all possible crystal orientations.
- a process for identifying minerals or crystals; a small rod is coated with a powdered form of the substance and subjected to suitably modified X-rays; the pattern of diffracted rings is used for identification