Some 60 new space-group corrections.

Area of Science:

• Crystallography and Materials Science
• Chemical Analysis and Structural Determination

Background:

• Crystal structure analysis is fundamental in chemistry, often serving as the ultimate evidence for molecular structures.
• Inconsistencies in published crystal structure data can arise from errors in symmetry determination.

Purpose of the Study:

• To identify and categorize errors in published crystal structures related to symmetry.
• To highlight the prevalence of these errors, even in recent publications, and emphasize the need for improved scrutiny.

Main Methods:

• Re-examination of approximately 60 published crystal structures.
• Analysis based on symmetry groups, Laue groups, and systematic absences.
• Categorization of identified errors into three types based on symmetry misrepresentation.

Main Results:

• Identified 60 crystal structures better described by higher symmetry space groups than originally published.
• Categorized errors include incorrect Laue group assignments (33 examples) and omission of symmetry centers (22 examples).
• A subset of errors (9 examples) involved both symmetry omission and failure to recognize systematic absences, impacting molecular geometry.

Conclusions:

• Significant errors in crystal structure symmetry assignments persist, affecting the reliability of structural data.
• Errors, particularly those involving symmetry centers and systematic absences, can lead to inaccurate molecular geometry.
• Enhanced critical review by authors, editors, and referees is essential to maintain the integrity of crystal structure analysis.