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Delvauxite, also known as borickite, is a yellow to brown to dark brown amorphous mineral, sometimes forming a botryoidal mass. It is a mineral approximately…

Delafossite is a copper iron oxide mineral with formula CuFeO2 or Cu1+Fe3+O2. It is a mineral consisting of an oxide of copper and iron formerly…

Apollonius’ theorem is an elementary geometry theorem relating the length of a median of a triangle to the lengths of its sides. It states that “the sum…

Dawsonite is a mineral composed of sodium aluminum carbonate hydroxide, chemical formula NaAlCO3(OH)2. It is an orthorhombic mineral composed of sodium aluminum carbonate hydroxide. It…

Daubréelite is a rare sulfide mineral. It crystallizes with cubic symmetry and has a chemical composition of Fe2+Cr3+2S4. It is a mineral consisting of a…

Daubréeite is a rare bismuth oxohalide mineral with formula BiO(OH, Cl). It is a sulphide of chromium observed in some meteoric irons. It is a…

Employee Selection Process Employee selection can range from a very simple process to a very complicated process depending on the firm hiring and the position.…

Datolite is a calcium boron hydroxide nesosilicate, CaBSiO4(OH). It is a popular mineral among mineral collectors although it is somewhat obscure. It was first observed…

Danburite is a calcium boron silicate mineral with a chemical formula of CaB2(SiO4)2. It is a mineral consisting of a calcium borosilicate that is transparent…

Danalite is an iron beryllium silicate sulfide mineral with formula: Fe2+4Be3(SiO4)3S. It is beryllium-bearing, and found typically in tin-beryllium skarns, but also found in NYF…

Concept of Employee Selection Employee selection can range from a very simple process to a very complicated process depending on the firm hiring and the…

Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum are extracted. The…