Science

The definitions of a plane curve like circle, parabola, ellipse etc. are based on the concept of the locus. For example, the locus of points…

Dollaseite-(Ce) is an epidote found in metamorphosed limes times and is very rare. It is a sorosilicate end-member epidote mineral and was discovered by Gajer…

Dmitryivanovite is a natural mineral composed of calcium, aluminum, and oxygen, with the molecular formula CaAl2O4. It was reported in 2009 in a calcium-aluminum-rich inclusion…

Djurleite is a copper sulfide mineral of secondary origin with formula Cu31S16 that crystallizes with monoclinic-prismatic symmetry. It is typically massive in form but does…

Introduction of locus – math: The concept of locus – math is very important in analytical geometry. The definitions of a plane curve like circle,…

Djerfisherite is an alkali copper–iron sulfide mineral and a member of the djerfisherite group. It is an isometric-hexoctahedral mineral containing chlorine, copper, iron, nickel, potassium,…

Dioptase is an intense emerald-green to bluish-green copper cyclosilicate mineral. It is transparent to translucent. Its formula is CuSiO3·H2O [also reported as CuSiO(OH)2]. It is…

Diopside is the mineral derives its name from the Greek words dis and opse, which mean twice and face, in reference to the two ways…

Dimorphite, chemical name tetraarsenic trisulfide (As4S3), is a very rare orange-yellow arsenic sulfide mineral. It is an orthorhombic-dipyramidal orange mineral containing arsenic and sulfur. In…

Digenite is a copper sulfide mineral with formula: Cu9S5. It is an important ore of copper, although it is not very well known even by…

Dickite is a phyllosilicate clay mineral named after the metallurgical chemist Allan Brugh Dick, who first described it. It is a phyllosilicate clay mineral chemically…

Diaspore also known as diasporite, empholite, kayserite, or tanatarite, is an aluminum oxide hydroxide mineral, α-AlO(OH), crystallizing in the orthorhombic system and isomorphous with goethite.…