The Aqueous Chemistry of Chromium(III) above 100 °C: Hydrothermal Synthesis of Chromium Spinels
The Aqueous Chemistry of Chromium(III) above 100 °C: Hydrothermal Synthesis of Chromium Spinels
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100 °C 以上铬(III) 的水相化学：铬尖晶石的水热合成
DOI：
10.1139/v71-397
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发表时间：
1971
影响因子：
1.1
通讯作者：
P. Bayliss
中科院分区：
文献类型：
--
作者：
T. Swaddle;J. H. Lipton;G. Guastalla;P. Bayliss
研究了三氯化铬、硝酸铬和高氯酸铬水溶液中CrO（OH）的水热沉积，以及Cr 3（SO 4）2（OH）5·H2O和Cr（OH）SO 4·2 H2O（？）硫酸铬（III）水溶液中的反应。在225 °C以上用0.4 M高氯酸和在250 °C以上用分子氧将铬（III）水溶液氧化成铬（VI）。铬（III）水溶液可以在300 °C下与铁或钢、钴和铜反应，分别生成FeCr 2 O 4、CoCr 2 O 4和Cu 2Cr 2 O 4。CrO（OH）与316型不锈钢在440 °C下在密度为0.7 g cm−3的超临界水中反应生成（Fe，Ni）-Cr2 O 4，这是Laubengayer和McCune的“立方Cr2 O3”。 尖晶石MCr_2 O_4（M = Mg，Mn，Fe，Co）可在约100 ℃水热合成。 从Cr（OH）3和M（OH）2。这一信息与蚀变现象有关，并可能是蛇纹岩中铬铁矿矿床的热液成因。
The hydrothermal deposition of CrO(OH) from aqueous chromium(III) chloride, nitrate, and perchlorate, and of Cr3(SO4)2(OH)5•H2O and Cr(OH)SO4•2H2O(?) from aqueous chromium(III) sulfate, has been investigated. Aqueous chromium(III) is oxidized to chromium(VI) by 0.4 M perchloric acid above 225 °C, and by molecular oxygen above 250 °C. Aqueous chromium(III) can react at 300 °C with iron or steel, cobalt, and copper to produce FeCr2O4, CoCr2O4, and Cu2Cr2O4, respectively. CrO(OH) reacts with type 316 stainless steel at 440 °C in supercritical water of density 0.7 g cm−3 to yield (Fe,Ni)-Cr2O4, which is the "cubic Cr2O3" of Laubengayer and McCune. The spinels MCr2O4 (M = Mg, Mn, Fe, Co) can be made hydrothermally at ca. 300 °C from Cr(OH)3 and M(OH)2. This information is relevant to corrosion phenomena, and the possible hydrothermal origin of chromite deposits in serpentinized rocks.