Science

Akatoreite {(Mn2+, Fe2+)9 Al2 [(OH)3|His4O13]} is a mineral found in New Zealand. It was named after the place it was initially discovered – Akatore Creek,…

Relating Fractions to Equivalent Decimals To change a fraction to a decimal, you divide the top number by the bottom number (divide the numerator by…

Akaganeite is an iron(III) oxide-hydroxide / chloride mineral with formula: Fe3+O(OH,Cl). It is a chlorine mineral/iron (III) oxide-hydroxide that is formed by the weathering pyrrhotite.…

Ajoite is a hydrated sodium potassium copper aluminum silicate hydroxide mineral. Ajoite has the chemical formula (Na,K)Cu7AlSi9O24(OH)6.3H2O and minor Mn, Fe and Ca are usually…

Conjugate Surds The sum and difference of two simple quadratic surds are said to be conjugate surds to each other. Conjugate surds are also known…

Simplifying Fractions Fractions may have numerators and denominators that are composite numbers (numbers that have more factors than 1 and itself). Simplifying (or reducing) fractions…

Aikinite is a sulfide mineral of lead, copper, and bismuth with formula PbCuBiS3. It forms black to grey or reddish brown acicular orthorhombic crystals with…

Ahlfeldite, formula ((Ni,Co)[SeO3]·2H2O) is a mineral of secondary origin. It’s named after Friedrich Ahlfeld (1892–1982), a German-Bolivian mining engineer and geologist. Its type locality is…

Aheylite is a rare phosphate mineral with formula (Fe2+Zn)Al6[(OH)4|(PO4)2]2·4(H2O). It was named after Allen V. Heyl, an economic geologist associated with the U.S. Geological Survey.…

Definitions of surds: A root of a positive real quantity is called a surd if its value cannot be exactly determined. It is a number…

Aguilarite is an uncommon sulfosalt mineral with formula Ag4SeS. It was described in 1891 and was named after Ponciano Aguilar, the former superintendent of the…

Least Common Multiple The Least Common Multiple (LCM) is the smallest number that two or more numbers will divide into evenly. The LCM of two…