Definition of trichroic in English:
trichroic
adjective trʌɪˈkrəʊɪktrīˈkrōik
Crystallography (of a crystal) appearing with different colours when viewed along the three crystallographic directions.
Example sentencesExamples
- Tanzanite has many hues that are reflected due to the fact it is a trichroic gem.
- The trichroic mirror is a thin rectangular wedge 3 by 5 inches in dimension and 0.125 inches thick.
- Naturally trichroic, the species shows different colors when viewed through each of its three crystal axes: blue, red-violet and yellow-green.
- The gemstone is trichroic in dark blue, green-yellow and red-purple.
- Very few stones are trichroic and this is what makes tanzanites very easy to identify.
- Only orthorhombic, monoclinic and triclinic minerals can be trichroic since they have three unique axes of symmetry and therefore three unique directions that can absorb light in three different ways.
- There is no other difference and Fancy Tanzanite displays the same amazing trichroic properties as blue/violet Tanzanite and has exactly the same physical and chemical properties.
- This new trichroic prism assembly is especially useful in a compact color projector employing reflective liquid-crystal light valves.
- Only difficulty is orienting the rough as it is trichroic.
- The trichroic element in the visible region is either transparent, for observation near infrared radiation from the sample using commercially available video cameras, or a beam splitter, for incorporation of a visible light illuminator in the attachment.
Derivatives
noun ˈtrʌɪkrəʊɪz(ə)m
Crystallography This colour variation is pleochroism (strictly trichroism in biaxial minerals).
Example sentencesExamples
- Most tanzanite is treated with heat to deepen the primary colors, and this subdues the trichroism slightly.
- In the more familiar blue variety, stones exhibit blue, violet and reddish orange but in fancy colors the trichroism is as follows.
- This is one of the features of the stone and is due to Tanzanite's trichroism.
- The cutter must orient the rough carefully, taking iolite's trichroism of blue, gray and near colorless into account.
Origin
Late 19th century: from Greek trikhroos (from tri- 'three' + khrōs 'colour') + -ic.