Science

Ankerite is a calcium, iron, magnesium, manganese carbonate mineral of the group of rhombohedral carbonates with the formula: Ca(Fe, Mg, Mn)(CO3)2. It forms in iron-rich hydrothermal…

Anhydrite is a mineral – anhydrous calcium sulfate, CaSO4. It is not a common mineral, as it easily alters the much more common mineral Gypsum…

A polynomial of the second degree is generally called a quadratic polynomial. In elementary algebra, the quadratic formula is the solution of the quadratic equation.…

Finding the Percent of a Number To determine the percent of a number do the following steps: Multiply the number by the percent (e.g. 87…

Anglesite is a lead sulfate mineral with the chemical formula PbSO4. It is a secondary lead mineral that always forms through the alteration of lead…

Andyrobertsite is a rare, complex arsenate mineral with a blue color. It is found in the Tsumeb mine in Namibia and named after Andrew C.…

Andradite is a species of the garnet group. It is a nesosilicate, with formula Ca3Fe2Si3O12. It is a member of the Garnet group, and although…

Andesine is a silicate mineral, a member of the plagioclase feldspar solid solution series. Its chemical formula is (Ca, Na)(Al, Si)4O8, where Ca/(Ca + Na)…

Condition for Common Root of Quadratic Equations A polynomial of the second degree is generally called a quadratic polynomial. In elementary algebra, the quadratic formula…

Finding Missing Number in a Sequence A Sequence is a set of things (usually numbers) that are in order. To find a missing number, first,…

Andersonite, Na2Ca (UO2) (CO3)3·6H2O, or hydrated sodium calcium uranyl carbonate. It is a rare uranyl carbonate mineral, that was only described in the last half…

Andalusite is an aluminum nesosilicate mineral with the chemical formula Al2SiO5. It is a polymorph with two other minerals: kyanite and sillimanite. Andalusite is trimorphic…