The galena/dichromate solution interaction and the nature of the resulting chromium(III) species

Clifford, 1975, AICHE Symp. Series, 71, 138 Nefedov, 1980, Surf. Interface Anal., 2, 170, 10.1002/sia.740020503 Wagner, 1979 Rollinson, 1973, III, 666 Rollinson, 1973, III, 667 Udy, 1956, Chromium, I, 210 Vernon, 1976, Inorg. Chem., 15, 278, 10.1021/ic50156a007 Ikemoto, 1976, J. Sol. State Chem., 17, 425, 10.1016/S0022-4596(76)80012-6 Allen, 1973, J. Chem. Soc. Dalton, 1675, 10.1039/DT9730001675 D. L. Perry, L. Tsao and H. G. Brittain, Inorg. Chem., in press. Perry, 1983, 185th Natl. Meet. ACS J. A. Taylor and D. L. Perry, J. Vac. Sci. Tech., in press. Toth, 1978, J. Inorg. Nucl. Chem., 40, 807, 10.1016/0022-1902(78)80156-0 The hydrolysis of a chromium(III) salt results in a hydrated oxide can be represented by formulas of the type Cr(OH)3 or CrOOH, which are analogous to the iron(III) hydrated oxides [14]. While often referred to as ‘Fe(OH)3’, they are not hydroxides in the true chemical sense but rather hydrated ferric oxides, Fe2O3·nH2O, which exhibit different structural modifications such as represented by α-,β-, and γ-FeOOH [14, 15]. Harvey, 1981, Anal. Chem., 53, 1684, 10.1021/ac00234a030 Gonzalez-Calbet, 1981, J. Inorg. Nucl. Chem., 43, 257, 10.1016/0022-1902(81)90006-3