🌐EnglishEnglishDeutschEspañolFrançaisItalianoPolskiРусский한국어中文日本語EntityQ1066315· pop 13· linked from 1,663 articlescrystallographic point groupclassification system for crystalsConnectionsHermann–Mauguin notationEntitypoint groups in three dimensionsEntityCategoriesCrystallographyDiscrete groupsSymmetry