Various salts with the chemical formula xNa2O ・ yB2O3 are known (Table), but the best known are the tetraborate Na2B4O7 and the metaborate NaBO2 . The orthoborate Na3BO3 ( x : y = 3 : 1 ) is not known. [Sodium tetraborate] The chemical formula is Na2B4O7 . The decahydrate Na2B4O7 · 10H2O is commonly known as borax and is a white, translucent mineral found in the deserts of western North America and in the sediments of brine lakes in the deserts of central Asia. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
化学式xNa2O・yB2O3に対応する種々の組成の塩(表)が知られているが,最もよく知られているのは,四ホウ酸塩Na2B4O7とメタホウ酸塩NaBO2である。オルトホウ酸塩Na3BO3(x:y=3:1)は知られていない。 [四ホウ酸ナトリウムsodium tetraborate] 化学式Na2B4O7。10水和物Na2B4O7・10H2Oがホウ砂boraxの名称でよく知られ,白色半透明の鉱物として,北アメリカ西部の砂漠地帯,中部アジアの砂漠中のかん(鹹)湖の沈殿物中に存在する。 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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