On the Crystal Structure of Neodymium Oxalate.

Structural aspects of displacive transformations: what can optical microscopy contribute? Dehydration of Sm2(C2O4)3·10H2O as a case study

“…The decahydrates Ln 2 (C 2 O 4 ) 3 Á10H 2 O with Ln = La-Er (including yttrium) crystallize in the monoclinic system, space group P2 1 /c (Hansson, 1970;Hansson et al, 1968;Ollendorff & Weigel, 1969;Huang et al, 1991) and consist of layers built up by the packing of honeycomb hexagonal six-membered rings to form a metal-oxalate network. Decahydrate crystal structures Ln 2 (C 2 O 4 ) 3 Á10H 2 O (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb and Dy) were first published by Ollendorff & Weigel (1969); the difficulty in locating most of the outer-sphere water molecules, which represent 40% of the water content in the stoichiometric formula, was noted.…”

Histochemical Localization of Carbonic Anhydrase in Mammalian Tissuea

“…At least two explanations are available. (1) The above figures might be an underestimation of the retained activity, since fixed tissues are much more difficult to homogenize than unfixed ones; or (2) The partial inactivation of the enzyme caused by the fixative is compensated for by complete immobilization of the enzyme in the sections. The latter hypothesis is supported by the finding that unfixed sections of rat kidney lost about 93% of their original CA activity when floated on a buffered sucrose solution for 10 min, while glutaraldehyde-fixed sections of the same tissue retained full a~t i v i t y .~ Already Hansson' noted that the staining of nuclei is different in fixed and unfixed tissues.…”

Directed Synthesis of Crystalline Plutonium(III) and (IV) Oxalates: Accessing Redox-Controlled Separations in Acidic Solutions

“…The majority of those materials consist of two-dimensional structures comprised of hexagonal or rectangular 4 or 6-membered rings of the general formulas, [Lnl(H20)m(C204)n)4,6,4-8 or Ln2(C204)J. [9][10][11][12] Cations and/or water molecules can be arranged interstitially between these layers. …”