Li2Mo4-(NH4)2MoO4-H2O system at 25°C

• Published in: Russian journal of inorganic chemistry Vol. 54; no. 10; pp. 1655 - 1661
• Main Authors: Tkhashokov, N. I., Mirzoev, R. S., Zhilova, S. B.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01-10-2009
• Subjects: Chemistry; Chemistry and Materials Science; Inorganic Chemistry; Physicochemical Analysis of Inorganic Systems; Ammonium Paramolybdate; Double Salt; Ammonium Molybdate; Thermal Curf; Thermolysis
• ISSN: 0036-0236; 1531-8613
• DOI: 10.1134/S0036023609100246

Solubility in the Li
2
MoO
4
-(NH
4
)
2
MoO
4
-H
2
O system at 25°C was studied. A congruently saturating double molybdate crystal hydrate LiNH
4
MoO
4
· H
2
O was found to form in the system. The density, refractive index, viscosity, surface tension, and specific electrical conductivity were measured for saturated aqueous solutions of the system. Molar volume, ionic strength, and equivalent conductivity isotherms were calculated. A correlation is observed between the variations of these properties of solutions and solubility in the system. The double salt was recovered and characterized by chemical analysis, IR spectroscopy, and dynamic and quasi-equilibrium thermogravimetry. A thermolysis scheme is suggested proceeding from the thermal curves and chemical analysis of intermediate phases.