Nickel powder is a form of gray-black or gray-gray powder. The chemical formula for nickel powder is Ni. It is insoluble in water and ammonia concentrated Nitric Acid. However, it is slightly soluble in dilute Nitric Acid.
Gallium selenide powder is a semiconductor material. Gallium selenide has a layered structure, and with the decrease in temperature, the maximum photoelectric effect of gallium selenide moves toward the shortwave direction.
Antimony trisulfide powder is usually yellowish-red to black amorphous powder; the specific color may vary depending on factors such as purity, crystallinity, and particle size.
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