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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

pectolite

Geology; Minerals

Pectolite is a white to gray mineral, NaCa 2 Si 3 O 8 (OH), sodium calcium inosilicate hydroxide. It crystallizes in the triclinic system typically occurring in radiated or fibrous crystalline ...

allabogdanite

Geology; Minerals

Allabogdanite is a very rare phosphide mineral with formula (Fe,Ni) 2 P, found in 1997 in a meteorite. It was described for an occurrence in the Onello meteorite in the Onello River basin, Sakha ...

ankerite

Geology; Minerals

Ankerite is a calcium, iron, magnesium, manganese carbonate mineral of the group of rhombohedral carbonates with formula: Ca(Fe,Mg,Mn)(CO 3 ) 2 . In composition it is closely related to dolomite, but ...

arsenic

Geology; Minerals

Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first ...

nambulite

Geology; Minerals

The general formula for nambulite is (Li,Na)Mn 4 Si 5 O 14 (OH). It is named after the mineralogist, Professor Matsuo Nambu (born 1917) of Tohoko University, Japan, who is known for his research in ...

fluorcaphite

Geology; Minerals

Fluorcaphite is a mineral with the chemical formula (Ca,Sr,Ce,Na) 5 (PO 4 ) 3 F. It is found in the Kola Peninsula in Russia. Its crystals are hexagonal to pyramidal. It is light to bright yellow and ...

alunite

Geology; Minerals

Alunite is a hydrated aluminium potassium,sulfate mineral, formula KAl 3 (SO 4 ) 2 (OH) 6 . It was first observed in the 15th century at Tolfa, near Rome, where it is mined for the manufacture of ...

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