🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ899033· pop 25· linked from 2,804 articlesspace groupsymmetry group of a configuration in spaceAvailable in 25 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةAfrikaansBahasa IndonesiaConnectionscrystal systemEntityhexagonal crystal systemEntityCategoriesCrystallographyDiscrete groupsFinite groupsMolecular geometrySymmetry