What is the difference between zeolite and molecular sieve?

Zeolite, molecular sieve, zeolite molecular sieve, these words are easy to confuse, today we will talk about the difference between them:
Zeolite is only one type of molecular sieve. Because zeolite is the most representative among molecular sieves, the terms "zeolite" and "molecular sieve" are easily confused by beginners.
Molecular sieves are crystalline silicates or aluminosilicates, composed of silicon-oxygen tetrahedrons or aluminum-oxygen tetrahedrons connected by oxygen bridges to form a molecular size (usually 0.3 nm to 2.0 nm) channel and cavity system , so as to have the characteristics of sieving molecules.
Molecular sieve is powder crystal with metallic luster, hardness is 3-5, and relative density is 2-2.8. While natural zeolite has color, synthetic zeolite is white, insoluble in water, thermal stability and acid resistance increase with the increase of SiO2/Al2O3 composition ratio.
The main difference between the two is in the use. Zeolite is generally natural, with different pore sizes. As long as there are cavities, it can prevent bumping; while the functions of molecular sieves are much more advanced, such as screening molecules, making catalysts, and slow-release catalysts. etc., so there are certain requirements for the aperture, and they are often artificially synthesized. I don't know if you have a deeper understanding of the relationship between zeolite and molecular sieves in today's explanation.