Science

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,…

Finding the Fourth Angle of a Quadrilateral Quadrilaterals are four-sided polygons, with four vertexes, whose total interior angles add up to 360 degrees. A quadrilateral…

Albite is a plagioclase feldspar mineral. It belongs to the Plagioclase Feldspar group, an isomorphous solid solution series. It is the sodium endmember of the…

Alarsite, formula- (AlAsO4) is an aluminum arsenate mineral with its name derived from its composition: aluminum and arsenate. It is a trigonal mineral. It occurs…

Alamosite, formula- (Pb12Si12O36) is a colorless silicate mineral named after the place where it was discovered, Álamos, Sonora, Mexico. It is named for the type…

Surds are numbers left in root form (√) to express its exact value. It has an infinite number of non-recurring decimals. Therefore, surds are irrational…

Finding the Third Angle of a Triangle Finding the third angle of a triangle when you know the measurements of the other two angles is…

Alacránite, formula- (As8S9) is an arsenic sulfide mineral first discovered in the Uzon caldera, Kamchatka, Russia.  It forms orange acicular crystals in subparalel groups with…

Alabandite is a rarely occurring manganese sulfide mineral. The name is derived from its supposed discovery locality at Alabanda, Turkey. It crystallizes in the cubic…

Complex Numbers The introduction of complex numbers plays a very important role in the theory of numbers. A complex number is a number of the…

Aktashite is a rare arsenic sulfosalt mineral with formula Cu6Hg6As4S12. It is a copper mercury-bearing sulfosalt and is the only sulfosalt mineral with essential Cu…

Akrochordite is a monoclinic-prismatic reddish-brown mineral containing arsenic, hydrogen, magnesium, manganese, and oxygen. It is an exceptionally rare hydrated hydrous arsenate mineral of the formula…