Science

Allanite: Identification and Occurrence

Allanite: Identification and Occurrence

Allanite also called orthite, is a sorosilicate group of minerals within the broader epidote group that contain a significant amount of rare-earth elements. This rare earth element includes many unusual and valuable metals. Up to 20% of its weight could be composed of these rare earth elements, .....

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Allactite

Allactite

Allactite (Formula: Mn7(AsO4)2(OH)8) is a rare arsenate mineral of metamorphosed manganese zinc ore deposits. It is a mineral consisting of a brownish red basic manganese arsenate. It is not Radioactive. It is found in Sweden and New Jersey, US. Named through the Greek word allasso, meaning “to.....

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Allabogdanite

Allabogdanite

Allabogdanite is a very rare phosphide mineral with formula (Fe, Ni)2P, found in 1997 in a meteorite. It is not Radioactive. It was described as an occurrence in the Onello meteorite in the Onello River basin, Sakha Republic; Yakutia, Russia; associated with taenite, schreibersite, kamacite, grap.....

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Arithmetic Progression

Arithmetic Progression

Arithmetic Progression In mathematics, an arithmetic progression (AP) or arithmetic sequence is a sequence of numbers such that the difference between the consecutive terms is constant. It is a sequence of numbers in which the consecutive terms (beginning with the second term) are formed by addin.....

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Aliettite

Aliettite

Aliettite is a complicated phyllosilicate mineral of the smectite group with a formula of (Ca0.2Mg6(Si, Al)8O20(OH)4·4H2O). It is not Radioactive. It is a soft, colorless to pale yellow or green earthy mineral which crystallizes in the monoclinic system as minute tabular to platy crystals. The o.....

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Properties of Complex Numbers

Properties of Complex Numbers

The complex number system can be defined as the algebraic extension of the ordinary real numbers by an imaginary number i. This means that complex numbers can be added, subtracted, and multiplied, as polynomials in the variable i, with the rule i2 = −1 imposed. A complex number really does keep.....

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Algodonite

Algodonite

Algodonite is a copper arsenide mineral with formula: Cu6As. It is a gray-white metallic, copper arsenide mineral, crystallizing in a hexagonal pattern. The mineral was first discovered from the Algodones silver mine in Coquimbo, Chile in 1857. It is a gray-white metallic mineral crystallizing in.....

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Alforsite: Occurrence and Identification

Alforsite: Occurrence and Identification

Alforsite is a barium phosphate chloride mineral with formula: Ba5(PO4)3Cl. The Apatite group is compromised of minerals that are isomorphous hexagonal phosphates. It was discovered in 1981 and named to honor geologist John T. Alfors (1930–2005) of the California Geological Survey for his work .....

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Trigonometry Terms

Trigonometry Terms

Trigonometry Terms Trigonometry is a branch of mathematics that studies relationships involving lengths and angles of triangles. The study of angles and of the angular relationships of planar and three-dimensional figures is known as trigonometry. A right triangle consists of one angle of 900 .....

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Aleksite

Aleksite

Aleksite is a rare lead-bismuth tellurium sulfosalt mineral with formula PbBi2Te2S2. This is a trigonal-hexagonal scalenohedral steel-gray mineral containing bismuth, lead, sulfur, and tellurium. It is an exceedingly rare mineral, only known from a very limited number of samples obtained from bis.....

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Aldermanite: Physical and Chemical Properties

Aldermanite: Physical and Chemical Properties

Aldermanite is a rare hydrated phosphate mineral with formula Mg5Al12(PO4)8(OH)22·32H2O. This is an orthorhombic colorless mineral containing aluminum, hydrogen, magnesium, oxygen, and phosphorus. It’s named after Arthur Richard Alderman (1901–1980), Professor of Geology and Mineralogy, .....

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Albrechtschraufite

Albrechtschraufite

Albrechtschraufite is a very rare complex hydrated Ca- and Mg-bearing uranyl fluoride carbonate mineral with formula Ca4Mg(UO2)2(CO3)6F2·17H2O. This is a triclinic-pinacoidal yellow-green mineral containing calcium, carbon, fluorine, hydrogen, magnesium, oxygen, and uranium. General information:.....

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