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A device used to measure optical activity.

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Differential Scanning Calorimetry (DSC)

A technique for measuring the temperature, direction, and magnitude of thermal transitions in a sample material by heating/cooling and comparing the amount of energy required to maintain its rate of temperature increase or decrease with an inert reference material under similar conditions.

Crystal Lattice Energy

Amount of energy that holds a crystal together, the energy change when a mole of solid is formed from its constituent molecules or ions (for ionic compounds) in their gaseous state.

Gangue

Sand, rock, and other impurities surrounding the mineral of interest in an ore.

Atomic Mass Unit (amu)

One twelfth of a mass of an atom of the carbon-12 isotope, a unit used for stating atomic and formula weights, also called dalton.

Functional Group

A group of atoms that represents a potential reaction site in an organic compound.

Accuracy

How closely a measured value agrees with the correct value.

Nuclear Reaction

Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.

Miscibility

The ability of one liquid to mix with (dissolve in) another liquid.

Meniscus

The shape assumed by the surface of a liquid in a cylindrical container.

Oil

Liquid triester of glycerol and unsaturated fatty acids.