Properties of Technically Important Hexavalent Chromium Compounds

Some physical properties of saturated, supersaturated and undersaturated aqueous potassium bichromate solutions

“…VHi0 Is the partial molal volume of water. A more practical equation for can be derived from eq 3 by using the relationships 7), (A) Gmellns Handbuch (8), (•) Kearley ( 9), ( ) Hartford (10). where M is the mass, d is the density, and µ is the molecular weight.…”

Thermodynamic study of aqueous sodium and potassium chloride and chromate systems at the temperature 298.15 K

“…For this reason, systems containing sodium and potassium chromates have been the subject of many experimental investigations. (1)(2)(3)(4)(5)(6)(7)(8) The purpose of the present paper is to investigate the solubilities of (m 1 NaCl + m 2 Na 2 CrO 4 )(aq) and (m 1 KCl + m 2 K 2 CrO 4 )(aq) at T = 298.15 K for which there are no data in the literature. In previous studies (9,10) the Pitzer ion-interaction model has been used to simulate the ternary MCl-M 2 Cr 2 O 7 -H 2 O and M 2 SO 4 -M 2 Cr 2 O 7 -H 2 O, and the quaternary MCl-M 2 SO 4 -M 2 Cr 2 O 7 -H 2 O (M = Na or K) sytems at T = 298.15 K. It was shown that the Pitzer equations could be used to obtain a sufficiently exact description of the properties of solutions containing bichromate salts.…”

Structure and vibrational dynamics of sodium sulfate/sodium chromate solid solutions

“…7 Other II→I transition temperatures from 413°C to 427°C have been reported. 8,9 The high temperature phase I is stable up to the melting point at 792°C. Phase I is hexagonal and the same space group as sodium sulfate phase I is proposed.…”