goniometer

Noun

Meaning

An instrument for measuring angles, especially the angles of crystals, or the inclination of planes.

Source: Webster's dictionary

bevel quadrant compass protractor instrument transit gauge sextant extensor angular clinometer altazimuth alidade octant backstaff

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An older type of goniometer is the four-circle goniometer, and its relatives such as the six-circle goniometer. Source: Internet

Data collection Mounting the crystal Animation showing the five motions possible with a four-circle kappa goniometer. Source: Internet

The cleavage angles can be measured with a contact goniometer, which is similar to a protractor. Source: Internet

The goniometer is used to position the crystal at selected orientations. Source: Internet