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Minerals

Naturally occurring substance that is solid and stable at room temperature, representable by a chemical formula, usually abiogenic, and has an ordered atomic structure. It is different from a rock, which can be an aggregate of minerals or non-minerals, and does not have a specific chemical composition. The general definition of a mineral encompasses the following criteria: 1 - Naturally occurring 2 - Stable at room temperature 3 - Represented by a chemical formula 4 - Usually abiogenic 5 - Ordered atomic arrangement

Contributors in Minerals

Minerals

brookite

Geology; Minerals

Brookite is orthorhombic, and one of the four naturally occurring polymorphs (minerals with the same composition but different structure) of titanium dioxide, TiO 2 , approved by the International ...

naldrettite

Geology; Minerals

Naldrettite is a mineral with a chemical formula of Pd 2 Sb. It is named after Anthony J. Naldrett (born 1933), a professor at the University of Toronto, who has made significant contributions to the ...

chlorargyrite

Geology; Minerals

Chlorargyrite is the mineral form of silver chloride (AgCl). Chlorargyrite occurs as a secondary mineral phase in the oxidation of silver mineral deposits. It crystallizes in the isometric - ...

pyrope

Geology; Minerals

The mineral pyrope is a member of the garnet group. Pyrope is the only member of the garnet family to always display red colouration in natural samples, and it is from this characteristic that it ...

chapmanite

Geology; Minerals

Chapmanite is a rare silicate mineral belonging to the nesosilicate group, discovered in 1924, and named in honour of the late Edward John Chapman (1821-1904), a geology professor at the University ...

ferrihydrite

Geology; Minerals

Ferrihydrite (Fh) is a widespread hydrous ferric oxyhydroxide mineral at the Earth's surface, and a likely constituent in extraterrestrial materials. It forms in several types of environments, from ...

majorite

Geology; Minerals

Majorite is a type of garnet mineral found in the upper mantle of the Earth. Its chemical formula is Mg 3 (Fe,Al,Si) 2 (SiO 4 ) 3 . It is distinguished from other garnets in having Si in octahedral ...

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