Antimony Oxide - Antimony Oxide

Japanese: 酸化アンチモン - サンカアンチモン
Antimony Oxide - Antimony Oxide

Naturally occurring low-temperature stable stibnite and high-temperature valentinite are mainly composed of Sb 2 O 3 . The yellow mineral called cervanite is composed of Sb 2 O 4 . [ I ] Antimony oxide (III): Sb 2 O 3 (291.50). Also called diantimony trioxide. Melting point 656 °C, boiling point 1425 °C. There are cubic (density 5.19 g cm -3 ) and orthorhombic (density 5.76 g cm -3 ) crystals, and the transition point is about 570 °C. Used in electronic materials, flame retardant, polymerization catalyst, reducing agent, clarifying agent for optical lenses, enamel, etc. [CAS 1309-64-4] [ II ] Antimony oxide (V): Sb 2 O 5 (323.50). Also called diantimony pentoxide. Antimony metal reacts with concentrated nitric acid to produce Sb 2 O 5 hydrate, which is then dehydrated at 350 °C to produce the anhydrous form. White powder. Density: 3.78 g cm -3 . Slightly soluble in water, and acidic. Starts to decompose at about 450 °C, becoming diantimony tetroxide (Sb 2 O 4) at 700-900 °C, and diantimony trioxide (Sb 2 O 3) at 1200 °C and above. Used as a pigment raw material, flame retardant, inorganic cation exchanger, etc. [CAS 1314-60-9] [ III ] Diantimony tetroxide. Sb 2 O 4 (307.50). It is considered to be a mixed oxide of Sb III and Sb V. When diantimony trioxide is heated to 400 °C in air for a long period of time, it becomes an oxide with the composition Sb 2 O 4 . Because it absorbs and releases oxygen between 500 and 1200 °C, it is used as a fining agent to degas molten glass. [CAS 1332-81-6]

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

Japanese:

天然に得られる低温安定型の方安鉱,高温型のバレンチン鉱はSb2O3を主成分とする.また,セルバンタイトとよばれる黄色の鉱物はSb2O4組成である.【】酸化アンチモン(Ⅲ):Sb2O3(291.50).三酸化二アンチモンともいう.融点656 ℃,沸点1425 ℃.立方晶系(密度5.19 g cm-3)と斜方晶系(密度5.76 g cm-3)の結晶があり,その転移点は約570 ℃ である.電子材料,難燃加工剤,重合触媒,還元剤,光学レンズの清澄剤,ほうろうなどに用いられる.[CAS 1309-64-4]【】酸化アンチモン(Ⅴ):Sb2O5(323.50).五酸化二アンチモンともいう.金属アンチモンと濃硝酸の反応で得られるSb2O5水和物を,350 ℃ で脱水すると無水物が得られる.白色の粉末.密度3.78 g cm-3.水にはわずかに溶け,酸性を示す.約450 ℃ で分解しはじめ,700~900 ℃ の間では四酸化二アンチモンSb2O4組成のものになり,1200 ℃ 以上では三酸化二アンチモンSb2O3となる.顔料原料,難燃加工剤,無機陽イオン交換体などに用いられる.[CAS 1314-60-9]【】四酸化二アンチモン.Sb2O4(307.50).Sbと Sbの混合酸化物とみられる.三酸化二アンチモンを空気中で400 ℃ に長時間加熱すると,Sb2O4組成の酸化物となる.このように,500~1200 ℃ の間で酸素を吸収したり放出したりするので,融解ガラスのガス抜きのための清澄剤として用いられる.[CAS 1332-81-6]

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