Hexagonal crystal family - Wikipedia
The hexagonal crystal family consists of two crystal systems: trigonal and hexagonal. A crystal system is a set of point groups in which the point groups themselves and their corresponding space groups are assigned to a lattice system (see table in Crystal system#Crystal classes).
Donald B Peck - Crystallography: The Hexagonal System
The crystals that are in the hexagonal crystal system are among the easiest to recognize. Their cross section, viewed from the termination, is usually hexagonal. However, many trigonal crystals are also hexagonal in cross section leading to possible confusion.
Crystal system - Wikipedia
In three dimensions, the hexagonal and trigonal crystal systems are combined into one hexagonal crystal family. Five of the crystal systems are essentially the same as five of the lattice systems. The hexagonal and trigonal crystal systems differ from the …
For example in hexagonal crystal the basis vectors in the basal plane are equal to each other │a 1│= │a 2│=a, and the angle between them is g=120°. The third vector is normal to hexagon plane (a=b=90°), but has a different length │a 3│=c. In reciprocal space vector b 3 is parallel a 3 and its length │b 3│=1/c Vectors b 1 and b 2
Hexagonal crystal family - Wikipedia - BME
The hexagonal crystal family consists of two crystal systems: trigonal and hexagonal. A crystal system is a set of point groups in which the point groups themselves and their corresponding space groups are assigned to a lattice system (see table in Crystal system#Crystal classes ).
Seven Crystal System, Examples - GeeksforGeeks
2024年4月1日 · Hexagonal crystals have four axes, three of which are of equal length and intersect at angles of 120 degrees, while the fourth axis is perpendicular to the other three. This creates a prism shape with a hexagonal base.
The forms of the hexagonal system are defined by the axial cross relationships. The hexagonal axes (fig. 6.1) consist of 4 axes, 3 of which are of equal length and in the same plane, as proposed by Bravais. These 3 axes, labeled a1, a2, and a3 have an angular relationship to each other of 120 degrees (between the + ends).
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