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5 wrz 2012 · Each mineral has a page linked to tables devoted to crystallography, crystal structures, X-Ray powder diffraction, chemical composition, physical and optical properties, Dana's New classification, Strunz classification, mineral specimen images, and alphabetical listings of mineral species.
31 lip 2018 · This site is an interface to a crystal structure database that includes every structure published in the American Mineralogist, The Canadian Mineralogist, European Journal of Mineralogy and Physics and Chemistry of Minerals, as well as selected datasets from other journals.
11 kwi 2024 · The smallest representation of a mineral is one unit cell. The unit cell for the mineral halite (sodium chloride, NaCl) appears in the figure below where the sodium atoms are purple and the chlorine atoms are green. Explore the following 3D molecular crystal structure of the mineral halite, below.
Minerals have highly ordered and repetitive atomic arrangements. We can model many crystal structures as being spherical atoms held together by ionic bonds. Ionic crystals contain anions packed around cations and vice versa. The key controls on ionic bonds are ionic size and charge.
Beyond the considerations of structural chemistry, they provide one of the most accurate methods for phase and/or compositional determination and for obtaining the molar volumes and densities of minerals (Table 5-2). Selected data for approximately 300 minerals are tabulated in Table 5-1.
Individual mineral species are defined by their chemistry and crystal structure. The complete list of all known mineral, approved by the Nomenclature Commision of the International Mineralogical Association, can be found at: IMA Mineral List .
The database of structural and chemical complexity parameters of minerals is updated by H-correction of structures with unknown H positions and the inclusion of new data. The revised average complexity values (arithmetic means) for all minerals are 3.54(2) bits/atom and 345(10) bits/cell (based upon 4443 structure reports).
