Apatite: Properties and Occurrence
An apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite, and chlorapatite, with high concentrations of OH−, F−, and Cl− ions, respectively,…
Chemistry
Apachite: Properties and Occurrence
Apachite is a copper silicate mineral with a general formula of Cu9Si10O29·11H2O. It is a phonolitic rock containing abundant amphibole and aenigmatite associated with the…
Antlerite: Properties and Occurrence
Antlerite is a greenish hydrous copper sulfate mineral, with the formula Cu3(SO4)(OH)4. It has been an important ore of copper and forms nice mineral specimens.…
Antitaenite
Antitaenite is a meteoritic metal alloy mineral composed of iron and nickel, 20–40% Ni (and traces of other elements) that has a face-centered cubic crystal…
Antimony: Properties and Occurrence
Antimony is a chemical element with symbol Sb (from Latin: stibium) and atomic number 51. A lustrous grey metalloid, it is found in nature mainly…
Serpentine Subgroup
The serpentine subgroup (part of the kaolinite-serpentine group) are greenish, brownish, or spotted minerals commonly found in serpentinite rocks. Besides for the main members of…
Anthonyite: Properties and Occurrence
Anthonyite is a hydrous secondary copper halide mineral with the chemical formula of Cu(OH, Cl)2•3(H2O). It is not radioactive. It was discovered in 1963 in…
Antarcticite: Properties and Occurrence
Antarcticite is an uncommon calcium chloride hexahydrate mineral with formula: CaCl2·6H2O. It forms colorless acicular trigonal crystals. It is an uncommon calcium chloride hexahydrate mineral.…
Anorthoclase
The mineral anorthoclase ((Na, K)AlSi3O8) is a crystalline solid solution in the alkali feldspar series, in which the sodium-aluminum silicate member exists in larger proportion.…
Anorthite: Properties and Occurrence
Anorthite is the calcium endmember of plagioclase feldspar. Plagioclase is an abundant mineral in the Earth’s crust. The formula of pure anorthite is CaAl2Si2O8. It…
Annite: Properties and Occurrence
Annite is a phyllosilicate mineral in the mica family. It has a chemical formula of KFe32+AlSi3O10(OH)2. Annite is the iron end member of the biotite…
Annabergite: Properties and Occurrence
Annabergite is an arsenate mineral consisting of a hydrous nickel arsenate, Ni3(AsO4)2·8H2O, crystallizing in the monoclinic system and isomorphous with vivianite and erythrite. It is…
Load More