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Fine ZnS powder is an efficient photocatalyst, which produces hydrogen gas from water upon illumination. Sulfur vacancies can be introduced in ZnS during its synthesis; this gradually turns the white-yellowish ZnS into a brown powder, and boosts the photocatalytic activity through enhanced light absorption. [1]
Compounds with zinc in the oxidation state +1 are extremely rare. [5] The compounds have the formula RZn 2 R and they contain a Zn — Zn bond analogous to the metal-metal bond in mercury(I) ion, Hg 2 2+. In this respect zinc is similar to magnesium where low-valent compounds containing a Mg — Mg bond have been characterised. [6]
Zinc sulfide (ZnS) is used in luminescent pigments such as on the hands of clocks, X-ray and television screens, and luminous paints. [150] Crystals of ZnS are used in lasers that operate in the mid-infrared part of the spectrum. [151] Zinc sulfate is a chemical in dyes and pigments. [147] Zinc pyrithione is used in antifouling paints. [152]
Zinc sulfate powder is an eye irritant. Ingestion of trace amounts is considered safe, and zinc sulfate is added to animal feed as a source of essential zinc, at rates of up to several hundred milligrams per kilogram of feed. Excess ingestion results in acute stomach distress, with nausea and vomiting appearing at 2–8 mg/kg of body weight. [18]
A compound semiconductor is a semiconductor compound composed of chemical elements of at least two different species. These semiconductors form for example in periodic table groups 13–15 (old groups III–V), for example of elements from the Boron group (old group III, boron, aluminium, gallium, indium) and from group 15 (old group V, nitrogen, phosphorus, arsenic, antimony, bismuth).
The refractive index of sphalerite (as measured via sodium light, average wavelength 589.3 nm) ranges from 2.37 when it is pure ZnS to 2.50 when there is 40% iron content. [6] Sphalerite is isotropic under cross-polarized light, however sphalerite can experience birefringence if intergrown with its polymorph wurtzite; the birefringence can ...
Zinc selenide is the inorganic compound with the formula ZnSe. It is a lemon-yellow solid although most samples have a duller color due to the effects of oxidation. It is an intrinsic semiconductor with a band gap of about 2.70 eV at 25 °C (77 °F), equivalent to a wavelength of 459 nm.
National Average Drug Acquisition Cost data from the Centers for Medicare and Medicaid Services [6] shows that the average price paid by retail pharmacies for an Edecrin 25 MG tablet was $5.24 as 11/28/13 by Bausch Health US, LLC, formerly Valeant Pharmaceuticals. The price from Bausch Health US, LLC increased to $21.72 per tablet as of 5/18/2016.