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Ag

(Encyclopedia)Ag, symbol for the element silver. ...

Zn

(Encyclopedia)Zn, symbol for the element zinc.

Zr

(Encyclopedia)Zr, symbol for the element zirconium. ...

Évora

(Encyclopedia)Évora ĕˈvôrə [key], town, capital of Évora dist. and of Altro Alentejo, S central Portu...

turquoise

(Encyclopedia)turquoise, hydrous phosphate of aluminum and copper, Al2(OH)3PO4·H2O+Cu, used as a gem. It occurs rarely in crystal form, but is usually cryptocrystalline. Turquoise is opaque and has a waxy luster; ...

niello

(Encyclopedia)niello nēĕlˈō [key] [Ital. from Latin nigellus=blackish], black metallic alloy of sulfur, copper, silver, and usually lead, used as an inlay on engraved metal. The metal surface is brushed with a ...

Cf

(Encyclopedia)Cf, symbol for the element californium. ...

molecular modeling

(Encyclopedia)molecular modeling, the computer simulation, by various means, of chemical structures or processes. Special computer-graphics programs can display three-dimensional images of molecular structures and ...

geochemistry

(Encyclopedia)geochemistry, study of the chemical changes on the earth. More specifically, it is the study of the absolute and relative abundances of chemical elements in the minerals, soils, ores, rocks, water, an...

Buttle Lake

(Encyclopedia)Buttle Lake, 11 sq mi (28 sq km), central Vancouver Island, SW British Columbia, Canada. It is the site of major zinc and copper deposits. ...