Science

A complex number is a number of the form a + bi, where ‘a’ and ‘b’ are real numbers and ‘I’ is an indeterminate satisfying…

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is a soft white or grey mineral consisting…

Gwihabaite is a rare ammonium potassium nitrate mineral (NH4, K)(NO3). It is a rare ammonium potassium nitrate mineral, orthorhombic in form and colorless with a…

Guyanaite (CrOOH) is a chromium oxide mineral that forms as an intergrowth with other chromium oxide minerals known as bracewellite (CrOOH) and grimaldiite (CrOOH) as…

Gunningite is one of the minerals in the Kieserite group, with the chemical formula (Zn, Mn2+)SO4·H2O. It is rare. It is found in dry areas…

Guilleminite (Ba(UO2)3(SeO3)2(OH)4•3H2O) is a uranium mineral named by R. Pierrot, J. Toussaint, and T. Verbeek in 1965 in honor of Jean Claude Guillemin (1923–1994), a…

Gugiaite is a melilite mineral, named for the Chinese village of Gugia where it was first discovered. Its chemical formula is Ca2BeSi2O7. It is a…

Guettardite is a rare arsenic-antimony lead sulfosalt mineral with formula Pb(Sb, As)2S4. It is a monoclinic-prismatic grayish black mineral containing antimony, arsenic, lead, and sulfur.…

Grunerite is a mineral of the amphibole group of minerals with formula Fe7Si8O22(OH)2. It is an iron-rich amphibole related to cummingtonite. The origin of the…

Groutite is a manganese oxide mineral with formula Mn3+O(OH). It is a mineral consisting of manganese, hydrogen, and oxygen, polymorphous with manganite, and belonging to…

Grossular is a calcium-aluminum species of the garnet group of minerals. It is a mineral of the garnet group, consisting essentially of calcium aluminum silicate.…

Grossite is a calcium aluminum oxide mineral with formula CaAl4O7. It is a monoclinic-prismatic mineral containing aluminum, calcium, and oxygen. It is a colorless to…