Knowra Mineral species Mineral species A mineral species is a naturally occurring crystalline substance defined by its chemical composition and crystal structure. These criteria distinguish one species from another, even when specimens differ in color or shape.
Crystal structure : The ordered three-dimensional arrangement of atoms, ions, or molecules in a crystalline solid. A species is distinguished partly by its characteristic atomic arrangement.
X-ray crystallography : A method that uses X-ray diffraction to determine the atomic arrangement in crystals. Diffraction patterns reveal structures used to distinguish species.
Mineral classification : The organization of minerals into groups according to shared chemical and structural features. Species are the basic named units organized by mineral classification.
Rock : A naturally occurring aggregate of one or more minerals or mineraloids. A rock is an aggregate; a mineral species is a distinct crystalline substance.
Chemical composition : The kinds and proportions of chemical elements in a substance. Composition, including permitted substitutions, helps define mineral species.
X-ray diffraction : The scattering of X-rays by a material’s regularly arranged atoms. Its measured patterns provide structural fingerprints for crystalline minerals.
Petrology : The study of rocks, their origins, composition, and transformations. Petrologists use mineral species to infer how rocks formed and changed.
Mineral variety : A named subdivision of a mineral species based on a notable feature such as color or composition. Varieties differ within a species without necessarily qualifying as separate species.
Crystallography : The science of crystals, including their structures, symmetry, and physical properties. It provides methods for identifying and comparing crystal structures.
Electron microprobe : An instrument that measures elemental composition in small regions of solid samples. It tests whether a specimen’s chemistry fits a proposed species definition.
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