It maintains a tetrahedral arrangement in both forms. Zinc sulfide ZnS is a unique compound that forms two types of crystalline structures. These two polymorphs are wurtzite and zincblende also known as sphalerite. Wurtzite has a hexagonal structure, while zincblende is cubic.
It is characterized by single bonds between each atom and maintenance of a zinc to sulfur ratio. Since the number of atoms in a single unit cell of Zn and S is the same, it is consistent with the formula ZnS. Therefore the ratio between cationic and anionic radii in zinc blend is 0.
This suggests a tetrahedral ion arrangement and four nearest neighbors from standard crystal structure prediction tables. Learn more about this molecule from CAS , the most authoritative and comprehensive source for chemical information. If your favorite molecule is not in our archive , please send an email to motw acs. The molecule can be notable for its current or historical importance or for any quirky reason. Thank you!
Find Out More. Careers Launch and grow your career with career services and resources. Communities Find a chemistry community of interest and connect on a local and global level. Discover Chemistry Explore the interesting world of science with articles, videos and more. Awards Recognizing and celebrating excellence in chemistry and celebrate your achievements. Funding Funding to support the advancement of the chemical sciences through research projects.
What molecule am I? In the images, the zinc atoms are purple; the sulfur atoms are yellow. Occurrence: Zinc sulfide occurs naturally as the mineral zinc blende, also called sphalerite, which is a mixture of iron and zinc sulfides. It is also prepared by reacting zinc oxide with hydrogen sulfide:. Physical properties : Zinc sulfide is found in two different crystal forms, as mentioned above.
The wurtzite form exists as white or yellowish-white crystals, while the sphalerite form exists as greyish white crystals. It has a density of 4. Chemical properties: Zinc sulfide is completely insoluble in water.
0コメント