Analysis of the crystal structure of metals by single crystal LaAlO3

The atoms in the metal body are arranged according to certain geometric rules. For the convenience of understanding, people regard the atom as a rigid ball, so that the metal can be regarded as an object formed by the compact accumulation of rigid balls according to certain geometric rules. The following is the crystal structure of lanthanum aluminate.

Combined with many years of practical experience, the crystal structure of lanthanum aluminate is summarized as follows

(1) Character

In order to study the arrangement of the source atoms in the sample, it is assumed that the atoms in the ideal crystal are fixed rigid spheres, and the imaginary lines are used to connect the atomic centers in the sample to form a space frame. This kind of space lattice is called lattice for short.

(2) Germ cell

A small geometric unit that can fully reflect the characteristics of character is called a title. The repeated arrangement of unit cells in three-dimensional space constitutes character.

(3) Character demands

Different elements have different atomic radii. After forming the cell, the size of the cell is different, and the shape of the cell can be expressed by the length of edge correction a, B, (and the angle between edges a, 8, y). The edge length of the unit cell is called the character constant, which is expressed in angstroms (a) (1a-10 * cm).

The above is the introduction of crystal structure of the metal prepared by lanthanum aluminate crystal. I hope it can help you. Friends in need can contact us directly.