Crystal-structure of Tetragonal Strontium Oxalate

Abstract

Two aspects of the structure of tetragonal calcium oxalate (weddellite), namely: (1) that the oxalate ion has the symmetry mmm; (2) that the crystalline salt has a water content of 2 + zeolitic X H₂O (_X ≤ 0.5) (ref. 1), can be examined further. Klasens, Perdok and Terpstra² described tetragonal strontium oxalate as being isomorphic with weddellite, but they gave the number of molecules of water in the former as 2.5 and in the latter as 3.