IPA: /ˌkrɪstəˈlɒɡrəfi/
KK: /ˌkrɪs.təˈlɒɡ.rə.fi/
The study of the arrangement of atoms in crystalline solids and the properties of crystals.
Crystallography is essential for understanding the structure of many materials.
Crystallography → It is formed from "crystal" (from Greek "kristallos", meaning frozen or ice) and "-graphy" (from Greek "grapho", meaning to write or describe). The word refers to the study or description of crystals and their structures.
Think of 'crystal' as something that is 'frozen' and 'graphy' as describing it — crystallography is the study of the structure of frozen forms.