Raman spectra of AlCl3-AlkCl and trends in species formation

Rytter, Erling; Øye, H. A.; Cyvín, S. J.; Cyvin, B. N.; Klæboe, P.

doi:10.1016/0022-1902(73)80191-5

Cited by 85 publications

(39 citation statements)

References 17 publications

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“…This investigation was undertaken as a part of a project to clarify the structure of A12X~-ions in the solid and liquid state. A linear A1-X-A1 bridge gave better correspondence between observed and calculated Raman frequencies for the melt (Rytter et al, 1973). However, a bent bridge was found for solid Pd2(C6Hs)2(AI2CI7)2 and Te4(A12Cl7)2 (Couch, Lokken & Corbett, 1972), the former with an eclipsed and the latter with a staggered conformation, indicating that environmental effects are important.…”

mentioning

confidence: 89%

The crystal structure of potassium heptabromodialuminate, KAl₂Br₇

Rytter¹,

Rytter²,

Øye³

et al. 1973

Acta Crystallogr Sect B

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Abstract. Potassium heptabromodialuminate, KA12Br7, is monoclinic with a= 12.373 (2), b= 10.822 (2), c= 14.444 (3) &, fl= 133.87 (1) °, Z=4, space group P2Jc and calculated density 3.107 g cm -3. The crystals were prepared by zone refinement. The AlzBr7 anion consists of two AIBr4 tetrahedra sharing one corner, in staggered arrangement with a bent A1-Br-AI bridge (109.3°). The potassium ion is surrounded by nine bromine ions at distances of 3.3 to 4.0 .~. Introduction.AIBr3 was prepared by reacting HBr with A1 (purity 99.999%, Vigelands Brug, Norway) at 450°C. The product was purified by repeated vacuum distillations. The dry HBr used, containing only traces of Br2, was prepared by reacting 85 % H3PO 4 with a mixture of NaBr and PzO~ in the weight ratio 1:3.

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mentioning

confidence: 89%

The crystal structure of potassium heptabromodialuminate, KAl₂Br₇

Rytter¹,

Rytter²,

Øye³

et al. 1973

Acta Crystallogr Sect B

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“…The physical realities behind this reversal is as already pointed out [I] a higher equilibrium constant for vaporization of LIAIC1, relative to NaAICl,, which is probably due to stronger ion pair formation between Lif and AlC1; [8] combined with a lower stability in the gas phase towards dissociation according to LiAlCl, (9) + LiCl(1) + AlCI, (9) .…”

Section: ~P N~a I C~~mentioning

confidence: 83%

“…It was assumed that the interaction between LiCl and NaCl is similar to the binary LiCl -NaCl system. The activities of LiCl and NaCl are then defined as: QLiCl = X{,i YLi (8) ONaCl = x&aYNa (9) where yLi and yNa can be transferred from the binary LiCl -NaCl system. This definition means that the activity of LiCl and NaCl are set equal to unity for the alkalichloride aluminium chloride binary mixtures with 4 wt-% AICl,.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

Vapour Pressure of Ternary LiClNaClAlCl₃ Melts

Knapstad¹,

Linga²,

Øye³

1981

Ber Bunsenges Phys Chem

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Apparate und Methoden / Fliissigkeiten / Case / ThermodynamikThe vapour pressure and vapour composition have been determined for ternary LiCl -NaCl -AICI, melts, dilute in AICI,. Three experimental methods have been employed in order to obtain unambiguous results; a) total pressure of the boiling liquid, b) vapour composition by direct condensation of the boiled-off vapour, c) mean molecular weight from inert gas transportation. The major gas molecules are NaAICI,, LiAICI,, and AICI,. NaAlCI, is found to be the major gas species over most of the composition range even though the total pressure of the binary LiCl -AICI, system is considerable higher than that for the corresponding NaCl -AICI, system. The results are described in terms of a semiempirical thermodynamic model.

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“…Instead it must be caused by the lower enthalpy of vaporization of the lithium complex, tiH?6 in Table 1. This may be correlated with ion pair formation between Alk + and AICli being more prevalent in the lithium system [17]. 14a -c. Fulldrawn lines are calculated while the experimental points for the known systems NaCI-AICI 3 and KCI-AICI 3 are taken from the phase diagram investigations ofShvartsman [20] and of Fischer and Simon [21].…”

Section: Discussionmentioning

confidence: 97%

“…The ion AICI; has been identified by Raman spectroscopy in melts with AICI 3 • Higher complexes, AI 2CI?" and possibly AI 3Clio, have been identified in melts with mol fraction of AICI 3 larger than 0.5 [14][15][16][17], but they are not believed to be of importance in the composition range studied here. The small partial pressure P MC1 may be safely neglected as referred above.…”

Section: Species In the Meltmentioning

confidence: 97%

Vapour Pressures of Molten Alkali Chloride–Aluminium Chloride Mixtures

Linga¹,

Motzfeldt²,

Øye³

1978

Ber Bunsenges Phys Chem

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The salt mixture is contained in a cell which is gas tight except for a capillary opening at the top. The cell with charge is suspended from a balance into a furnace, and the system is closed, evacuated, and degassed at moderate temperature. Inert gas (argon) is then admitted to a pressure higher than the expected vapour pressure, and the furnace temperature is brought to the desired level and kept constant. The recorder attached to the balance shows the mass of the cell as a function of time, and the slope of the curve gives the rate of mass loss til, which is the rate of vapour transport through the capillary of the cell. This rate initially is low, caused only by diffusion of the vapour through a higher pressure of inert gas.The inert gas pressure then is stepwise lowered by pumping. Each value of the inert gas pressure P, (read on a mercury manometer) corresponds to a value of til (from the slope of the recorder tracing), with increasing values of til for decreasing values of Pro

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Raman spectra of AlCl3-AlkCl and trends in species formation

Cited by 85 publications

References 17 publications

The crystal structure of potassium heptabromodialuminate, KAl₂Br₇

The crystal structure of potassium heptabromodialuminate, KAl₂Br₇

Vapour Pressure of Ternary LiClNaClAlCl₃ Melts

Vapour Pressures of Molten Alkali Chloride–Aluminium Chloride Mixtures

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Raman spectra of AlCl3-AlkCl and trends in species formation

Cited by 85 publications

References 17 publications

The crystal structure of potassium heptabromodialuminate, KAl2Br7

The crystal structure of potassium heptabromodialuminate, KAl2Br7

Vapour Pressure of Ternary LiClNaClAlCl3 Melts

Vapour Pressures of Molten Alkali Chloride–Aluminium Chloride Mixtures

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The crystal structure of potassium heptabromodialuminate, KAl₂Br₇

The crystal structure of potassium heptabromodialuminate, KAl₂Br₇

Vapour Pressure of Ternary LiClNaClAlCl₃ Melts