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Qu'est-ce (qui) est tetragonal symmetry - définition
CHEMICAL COMPOUND
Tetragonal zirconia polycrystaline; TZP; Tetragonal Zirconia Polycrystal
Symmetry (physics)
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FEATURE OF A SYSTEM THAT IS PRESERVED UNDER SOME TRANSFORMATION
Internal symmetry; Global symmetry; Isometries in physics; Local symmetry; Internal symmetries; Symmetry in physics; Symmetry transformations
In physics, a symmetry of a physical system is a physical or mathematical feature of the system (observed or intrinsic) that is preserved or remains unchanged under some transformation.
mirror symmetry
![A [[normal distribution]] bell curve is an example symmetric function](https://commons.wikimedia.org/wiki/Special:FilePath/Empirical Rule.PNG?width=200 "A [[normal distribution]] bell curve is an example symmetric function")
![Many animals, such as this [[spider crab]] ''[[Maja crispata]]'', are bilaterally symmetric.](https://commons.wikimedia.org/wiki/Special:FilePath/Maja crispata (Maia verrucosa) - Museo Civico di Storia Naturale Giacomo Doria - Genoa, Italy - DSC03222 Cropped.JPG?width=200 "Many animals, such as this [[spider crab]] ''[[Maja crispata]]'', are bilaterally symmetric.")
![Mirror symmetry is often used in [[architecture]], as in the facade of [[Santa Maria Novella]], [[Florence]], 1470.](https://commons.wikimedia.org/wiki/Special:FilePath/Santa Maria Novella.jpg?width=200 "Mirror symmetry is often used in [[architecture]], as in the facade of [[Santa Maria Novella]], [[Florence]], 1470.")
SYMMETRY WITH RESPECT TO A PLANE, WHEN THE SHAPE DOES NOT CHANGE BY REFLECTING ALL OF ITS PART FROM A MIRROR PLANE
Plane of symmetry; Line of symmetry; Mirror Symmetry; Reflectional symmetry; Axes of symmetry; Line symmetry; Reflective symmetry; Reflection symmetries; Mirror symmetric; Linear symmetry; Mirror symmetry
¦ noun symmetry about a plane, like that between an object and its reflection.
Rotational symmetry
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SYMMETRY (SOMETHING LOOKING THE SAME) UNDER ROTATION
Rotation symmetry; Axisymmetric; Rotational Symmetry; Trilateral symmetry; Rotational symmetric; Rotational symetry; Axisymmetrical; Axisymmetry; Symmetry axis; Rotational symmetries; Rotationally symmetric; Pinwheeling; Rationally symmetrical; Rotationally symmetrical; Discrete rotational symmetry
Rotational symmetry, also known as radial symmetry in geometry, is the property a shape has when it looks the same after some rotation by a partial turn. An object's degree of rotational symmetry is the number of distinct orientations in which it looks exactly the same for each rotation.
Wikipédia
Tetragonal polycrystalline zirconia
Yttria blends of approximately 3% are called either tetragonal polycrystalline zirconia or tetragonal zirconia polycrystal (forming the initialisms TZP or TPZ) and have the finest grain size. These grades exhibit the highest toughness at room temperature, because they are nearly 100% tetragonal, but this degrades severely between 200 and 500 °C as these irreversible crystal transformations also cause dimensional change.
