Definition of Polysynthetic twinning. Meaning of Polysynthetic twinning. Synonyms of Polysynthetic twinning

Here you will find one or more explanations in English for the word Polysynthetic twinning. Also in the bottom left of the page several parts of wikipedia pages related to the word Polysynthetic twinning and, of course, Polysynthetic twinning synonyms and on the right images related to the word Polysynthetic twinning.

Definition of Polysynthetic twinning

Polysynthetic twinning
Polysynthetic Pol`y*syn*thet"ic, a. [Poly- + synthetic.] Characterized by polysynthesis; agglutinative. Polysynthetic twinning (Min.), repeated twinning, like that of the triclinic feldspar, producing fine parallel bands in alternately reversed positions.
Polysynthetic twinning
Twinning Twin"ning, n. (Crystallog.) The assemblage of two or more crystals, or parts of crystals, in reversed position with reference to each other in accordance with some definite law; also, rarely, in artificial twinning (accomplished for example by pressure), the process by which this reversal is brought about. Polysynthetic twinning, repeated twinning of crystal lamell[ae], as that of the triclinic feldspars. Repeated twinning, twinning of more than two crystals, or parts of crystals. Twinning axis, Twinning plane. See the Note under Twin, n.

Meaning of Polysynthetic twinning from wikipedia

- The type of twinning can be a diagnostic tool in mineral identification. There are three main types of twinning. The first is growth twinning which can...
- Plagioclase almost universally shows a characteristic polysynthetic twinning that produces twinning striations on [010]. These striations allow plagioclase...
- it as soon as a dome is cut. The Journal of gemmology mentions polysynthetic twinning (parallel lines). The star effect occurs in other sapphire colours...
- Sixlings are common in aragonite. Polysynthetic twins are similar to cyclic twins through the presence of repetitive twinning; however, instead of occurring...
- in extinctions viewed under cross polarization. Ulexite displays polysynthetic twinning parallel to the elongation, along {010} and {100} (Murdoch, 1940)...
- acicular to tabular prismatic Twinning Common as contact or penetration twins on {100} and {201}. Polysynthetic twinning also present. Cleavage Perfect...
- tabular, prismatic, rhombohedral crystals, m****ive or granular Twinning Polysynthetic twinning common Cleavage None – parting in 3 directions Fracture Conchoidal...
- that it actually abides by two twin laws. Polysynthetic twinning can occur along its (001) and another type of twinning can occur parallel to its optical...
- tabular and tabular-prismatic types are much less common. Complex polysynthetic twinning is very often observed. Belomorite is of igneous origin; it is part...
- brown or pink. Crystal habit Prismatic to columnar form Twinning Microscopic polysynthetic twinning common Cleavage [100] Perfect, [110] good, [011] distinct...