The Structure of the High Temperature Modification of Lithium Sulfate.

Førland, Tormod; Krogh-Moe, J.; Moutschen-Dahmen, M.; Noer, B.; Reio, L.

doi:10.3891/acta.chem.scand.11-0565

Cited by 90 publications

(24 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The mass loss to ,~ 550 ~ was ~ 49 % (theoretical for production of Li2SO4, 47.1 9/0) and lmth~, TG and DTA profiles were essentially steady at this temperature. The appearance of a strong endotherm at 605 ~ is consistent with a solid state phase change in lithium sulphate [12].…”

Section: Resultsmentioning

confidence: 53%

See 1 more Smart Citation

Thermal properties of molten sulphur-oxyanionic salts

Meehan

Tariq

Hill

1977

Journal of Thermal Analysis

View full text Add to dashboard Cite

Lithium, sodium, potassium and ammonium bisulphate have been shown by detailed TG/DTA studies to have limited application as molten solvents. By contrast, the eutectic bisulphate systems, ammonium-potassium bisulphate and sodium-potassium bisulphate, appear to be excellent molten solvents in view of their low melting points, long liquid ranges and prolonged thermal stability at 200 ~ . In contrast to previous studies, potassium pyrosulphate has been found to be an excellent molten solvent, provided rigorous preliminary drying procedures have been applied.A thorough knowledge of the thermal stability of a salt melt is an essential prerequisite if the melt is to be used as a reactive solvent for inorganic solutes. The relatively low melting points of alkali metal and ammonium bisulphates, and also alkali metal pyrosulphates suggest that these compounds may be useful reactive molten solvents. The present work involves various one-and two-component salt systems with a view to investigating the usefulness of these salts as molten solvents. The thermal properties of several of these systems have been reported previously [1-9], however, the wide variation in results due to differences in preliminary sample preparation, operating conditions, and precision of thermoanalytic~al-equipment, made a thorough re-examination of these systems necessary. Isothermal thermogravimetric studies on most of the systems have not been previously reported. The salts investigated in the present programs are sodium bisulphate, potassium bisulphate, lithium bisulphate, ammonium bisulphate, eutectic sodiumpotassium bisulphate, eutectic potassium-ammonium bisulphate, and potassium pyrosulphate.

show abstract

Section: Resultsmentioning

confidence: 53%

“…Thermal Anal. 12,1977 molten salt was maintained in a tube furnace at elevated temperatures. The results indicated that this was a valid assumption.…”

Section: Discussionmentioning

confidence: 99%

Thermal properties of molten sulphur-oxyanionic salts

Meehan

Tariq

Hill

1977

Journal of Thermal Analysis

View full text Add to dashboard Cite

show abstract

“…The ionic conductivity of the high-temperature phase, a-Li 2 SO 4 , is of the order of $1 O À1 cm À1 at 6108C [24]. Forland and Krogh-Moe [25] have investigated the structure of a-phase and found that a molten sublattice-type mechanism is responsible for the large conductivity in a-Li 2 SO 4 .…”

Section: Introductionmentioning

confidence: 99%

Effect of preparative parameters on the electrical conductivity of Li2SO4–Al2O3 composites

Gopalan¹,

Bhandari²,

Kulkarni³

et al. 2002

Materials Research Bulletin

View full text Add to dashboard Cite

“…Already in 1957 it was found that strong rotational oscillations must be expected for the high temperature modification of Li 2 S0 4 (557-860°C) [1]. In 1962 alternative models for the spatial orientation of the sulphate ions [2] were presented, and it was concluded from space considerations that the motion of the sulphate ions must be strongly coupled.…”

Section: Introductionmentioning

confidence: 99%

Notiz: Sulphate Rotator Phases in Polarised Light

Tärneberg

1996

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

Li 2 S0 4 has a well defined high-conducting fee phase in the temperature range 577-860 °C, and LiNaS0 4 a bcc phase in the range of 518-614 °C. Both salts were studied in polarised light during sequences going from melt, through the cubic phase into the "room temperature" phase, and back to the cubic phase. The two cubic sulphate phases are compared with organic plastic rotator phases, especially regarding the formation of vapour snakes.

show abstract

The Structure of the High Temperature Modification of Lithium Sulfate.

Cited by 90 publications

References 0 publications

Thermal properties of molten sulphur-oxyanionic salts

Thermal properties of molten sulphur-oxyanionic salts

Effect of preparative parameters on the electrical conductivity of Li2SO4–Al2O3 composites

Notiz: Sulphate Rotator Phases in Polarised Light

Contact Info

Product

Resources

About