General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

A mineral series in the apatite group, or in the larger grouping of phosphate, arsenate, and vanadate-type minerals. In this series lead (Pb) substitutes for calcium (Ca) of the apatite formula Ca 5 ...

Analcime

Science; General science

A mineral with a framework structure in which all the aluminosilicate tetrahedral vertices are linked, thus allying it to the feldspars, feldspathoids, and zeolites. The structure is cubic, space ...

Wolframite

Science; General science

A mineral with chemical composition (Fe,Mn)WO 4 , intermediate between ferberite, the iron tungstate, and huebnerite, the manganese tungstate, which form a complete solid solution series.

Zircon

Science; General science

A mineral with the idealised composition ZrSiO 4 , one of the chief sources of the element zirconium. Trace amounts of uranium and of thorium are often present and the mineral may then be partly or ...

Huebnerite

Science; General science

A mineral with the chemical composition MnWO 4 . Huebnerite is the manganese member of the wolframite solid-solution series. It commonly contains small amounts of iron. It occurs in monoclinic, ...

Anglesite

Science; General science

A mineral with the chemical composition PbSO 4 . Anglesite occurs in white or gray, orthorhombic, tabular or prismatic crystals or compact masses (see illus. ). It is a common secondary mineral, ...

Epsomite

Science; General science

A mineral with the chemical composition MgSO 4 · 7H 2 O. Epsomite, or epsom salt, occurs in clear, needlelike, orthorhombic crystals. More commonly it is massive or fibrous, although crystals from ...