Densities and heat capacities of aqueous arsenious and arsenic acid solutions to 350°C and 300bar, and revised thermodynamic properties of , and iron sulfarsenide minerals

Correlation and prediction of thermodynamic properties of nonelectrolytes at infinite dilution in water over very wide temperature and pressure ranges (2000K and 10GPa)

“…The analysis of data makes possible to allocate hydroxides of metalloids as a specific class of compounds (representatives of this class are B(OH) 3 , Si(OH) 4 , As(OH) 3 , Sb(OH) 3 , Ge(OH) 4 , etc). Precise V 1 2 data are measured for B(OH) 3 (Ellis and McFadden, 1972;Ward and Millero, 1974;Hnědkovský et al, 1995;Ganopolsky et al, 1996;Abdulagatov and Azizov, 2004) and for As(OH) 3 (Anderson and Story, 1923;Bjellerup et al, 1957;Perfetti et al, 2008). For Si(OH) 4 the partial molar volumes were estimated from the equation (Manning, 1994) describing solubility of quartz in water.…”

Structures and acidity constants of arsenite and thioarsenite species in hydrothermal solutions

“…As can enter a variety of mineral phases including sulfides, arsenides and sulfarsenides; therefore As associates with Cu/Au/Ag/Pb/Zn/PGE (platinum group elements) in various metal deposits (Heinrich and Eadington, 1986;Kerr et al, 1999;Hem et al, 2001;Barkov et al, 2004). Due to the variable oxidation states in solutions (i.e., + 3 and + 5), As can form many aqueous species such as arsenites, arsenates, (oxy)thioarsenites and (oxy)thioarsenates (Perfetti et al, 2008). As is toxic, and an elevated level of As in water has led to massive human health problems in many areas (Charlet and Polya, 2006;Hopenhayn, 2006).…”

Arsenopyrite weathering under conditions of simulated calcareous soil

“…On the basis of the experimental evidence presented here and the equilibrium data published in the literature (e.g., Stumm and Morgan 1996;Burgot 2012;Perfetti et al 2008;Lu and Zhu 2011), the following mechanisms are suggested for arsenopyrite weathering under simulated calcareous soils conditions.…”