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A series of elements, all of which are radioactive with atomic numbers greater than 88

A triclinic mineral, NaAlSi3O8; a member of the plagioclase and the alkali feldspar series having prismatic cleavage; a common rock-forming mineral in felsic igneous rocks

Substances used to neutralize acid from materials for storage, disposal, handling etc. Typically these include calcium or magnesium carbonate, CaCO3 and MgCO3, respectively

A controlled disturbance of a mixture or solution, largely achieved by mechanical means including vibration

A metallurgical process utilizing acid solution to dissolve metals such as gold, uranium, copper

Machine using air flow to induce separation of aerophilic and hydrophilic particles Air bubbles of a lower pressure lift aerophilic particles to an overflow thereby separating hydrophilic particles

Rock or various type and grade, including sand, used in many cases as fill

A pyroclastic deposit characterized by vitric binding or sintering of its minerals

A bright green or blue green variety of microcline sometimes cut as semi precious stones and for ornamental use

Alloys of mercury with one or more metal