[{"from": "human", "value": "Describe this molecule. [Zn][=Se]"}, {"from": "gpt", "value": "The molecule is a chemical compound of zinc and selenium. It occurs naturally as the mineral stilleite. Zinc selenide is a semiconductor and is used in light-emitting diodes, diode lasers, x-ray and gamma ray detectors, and as as infrared optical material. Zinc is a metallic element with the atomic number 30. It is found in nature most often as the mineral sphalerite. Though excess zinc in harmful, in smaller amounts it is an essential element for life, as it is a cofactor for over 300 enzymes and is found in just as many transcription factors. Selenium is a nonmetal element with the atomic number 34 and the chemical symbol Se. Selenium rarely occurs in its elemental state in nature and is usually found in sulfide ores such as pyrite, partially replacing the sulfur in the ore matrix. It may also be found in silver, copper, lead, and nickel minerals. Though selenium salts are toxic in large amounts, trace amounts of the element are necessary for cellular function in most animals, forming the active center of the enzymes glutathione peroxidase, thioredoxin reductase, and three known deiodinase enzymes. (L620, L48, L49, L77)"}]