Science

Althupite is a rare aluminum thorium uranyl phosphate mineral with the complex formula written as AlTh(UO2)7(PO4)4O2(OH)5·15H2O, from a granitic pegmatite. Its named after its composition…

Althausite is a relatively simple magnesium phosphate mineral with formula Mg2(PO4) (OH, F). It is very rare. The mineral is light grey with vitreous lustre,…

Altaite, or lead telluride, is a yellowish white mineral with an isometric crystal structure. It is a mineral consisting of lead telluride PbTe tin-white when…

Alstonite, also known as bromlite, is a low-temperature hydrothermal mineral that is a rare double carbonate of calcium and barium with the formula BaCa(CO3)2, sometimes…

Alsakharovite-Zn is an extremely rare alkaline strontium zinc titanium silicate mineral from the cyclosilicates class, with the formula written as NaSrKZn(Ti, Nb)4 (Si4 O12)2 (O,…

A sequence of numbers is known as an arithmetic progression (A.P.) if the difference between the term and the preceding term is always same or…

A sequence of numbers is known as an arithmetic progression (A.P.) if the difference between the term and the preceding term is always same or…

Almarudite is an extremely rare alkaline manganese beryllium silicate mineral of the cyclosilicates (ring silicates) class, with the formula written as K([], Na)2 (Mn2+, Fe2+,…

Almandine, formula- [Fe32+ Al2 Si3 O12], is the ferrous iron end member of the class of garnet minerals representing an important group of rock-forming silicates,…

A sequence of numbers is known as an arithmetic progression (A.P.) if the difference between the term and the preceding term is always same or…

Alluaudite is a relatively common alkaline manganese iron phosphate mineral with formula (Na, Ca)Mn2+(Fe3+, Mn2+, Fe2+, Mg)2(PO4)3. It is a rare mineral (Na, Fe, Mn)PO4 consisting of…

Selection of Terms in an Arithmetic Progression A sequence of numbers is known as an arithmetic progression (A.P.) if the difference between the term and…