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QM | Term | Definition |
S or ★ | Star | high-quality diffractometer or Guinier data, chemical composition has been well-characterized, intensities have been measured objectively, good range and even spread of intensity, etc. |
R | Rietveld | d-values are directly the result of Rietveld refinement of the data (only accepted in unusual cases) |
G | Good | material has significant amorphous content and has a digital diffraction pattern with good signal-to-noise ratio |
I | Indexed | pattern has been indexed; therefore, the material is almost certainly single-phase |
C | Calculated | calculated from single-crystal structural parameters; structural refinement R-factor was <0.10 |
P | Prototyping | used in the LPF. Prototype structure is an editorial action?(i.e., assigned by the PDF editor, not the original source) to assign space group coordinates for entries that have not determined this from the primary literature |
M | Minimal Acceptable | similar to good except no chemical analysis data was submitted to support the materials composition? |
B | Blank | does not meet Star, Indexed, or Low-Precision criteria |
O | Low-Precision | data taken on poorly characterized material or data known (or suspected) to be low precision |
H | Hypothetical | calculated from the atomic positions and thermal parameters of an isostructural compound |
半熟玉子のコツ! 2018.09.06