Structure and Raman spectra of single crystal La2(SO4)3 · 8H2O

Vanderpool, Richard A.; Khan, Masood A.; Frech, Roger

doi:10.1016/0022-2860(91)87101-m

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2015

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“…Lanthanum sulfate enneahydrate, La 2 (SO 4 ) 3 $9H 2 O, is the most common hydrate of lanthanum sulfate, La 2 (SO 4 ) 3 $nH 2 O (n ¼ 1-9) [1][2][3] and is the only stable hydrate in contact with its solution between 0 and 100 . La 2 (SO 4 ) 3 is sparingly soluble at room temperature and the solubility diminishes with temperature.…”

Section: Introductionmentioning

confidence: 99%

A Raman spectroscopic investigation of speciation in La₂(SO₄)₃(aq)

Rudolph

Irmer

2015

RSC Adv.

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Raman spectroscopic measurements have been made of aqueous solutions of La(ClO 4 ) 3 , La 2 (SO 4 ) 3 , and Na 2 SO 4 in water and heavy water, in the terahertz frequency region (40-1400 cm À1) and down to low , the n 1 -SO 4 2À band in La 2 (SO 4 ) 3 (aq) showed systematic differences from that in Na 2 SO 4 (aq). This is consistent with a n 1 -SO 4 2À band at 983.3 cm À1 that can be assigned to the existence of an outer-sphere complex (OSCs). The observed change of the degree of sulfato-complex formation with dilution reflects the stepwise sulfato-complex formation. A K 3 -value has been determined at 0.9 of the equilibrium between OSC and ISC.

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Section: Introductionmentioning

confidence: 99%