There are five known compounds of chromium and sulfur: [Chromium(II) sulfide] Chemical formula: CrS. It can be obtained by reacting anhydrous chromium(II) chloride with hydrogen sulfide at 600°C, or by mixing metallic chromium and sulfur in a 1:1 ratio and heating for a long time at 1000°C in a vacuum . It can also be obtained by reacting a mixture of chromium and aluminum with hydrogen sulfide to produce Al2CrS4 , which is then reacted with nitric acid to produce black crystals. It is a black-gray powder that forms hexagonal columnar crystals. Its melting point is 1550°C (decomposition begins at 1350°C). Source: Heibonsha World Encyclopedia, 2nd Edition Information |
クロムと硫黄の化合物で,次に示す5種類が知られている。 [硫化クロム(II)] 化学式CrS。塩化クロム(II)無水和物を600℃で硫化水素と反応させるか,金属クロムと硫黄を1:1に混合し,真空中1000℃で長時間加熱して得られる。またクロムとアルミニウムの混合物に硫化水素を反応させてAl2CrS4とし,これを硝酸と反応させると黒色結晶として得られる。黒灰色粉末で,六方晶系柱状晶をなす。融点1550℃(1350℃で分解が始まる)。 出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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