Premium
Sur la séparation des terres rares à l'aide de l'acide éthylènediamine‐tétraacétique. V. Les diagrammes de solubilité NH 4 [La‐édta] NH 4 [Sm‐édta] H 2 O et K[La‐édta] K[Sm‐édta] H 2 O à 0°
Author(s) -
Brunisholz G.,
Cahen R.
Publication year - 1958
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.660410123
Subject(s) - chemistry , lanthanum , samarium , phase diagram , nuclear chemistry , crystallography , inorganic chemistry , phase (matter) , organic chemistry
In the system NH 4 [La‐EDTA] NH 4 [Sm‐EDTA] H 2 O (EDTA = ethylenediamine tetraacetate), two solid phases appear at 0°: the samarium‐rich mixed crystals NH 4 [( Sm , La)‐EDTA], 8H 2 O (= phase α) and the lanthanum‐rich phase β (= NH 4 [( La , Sm)‐EDTA], n H 2 O; n=probably3). The solubility diagram shows two saturation curves; an important miscibility gap exists between the two phases. The system belongs to the type IV of the Roozeboom classification.