Abstract
The crystal structure of gadolinium formate has been studied by means of Laue, rotation, and powder x‐ray patterns. It has a rhombohedral lattice. The unit cell, a0=6.17A, a=115° 30′, contains one molecule, Gd(OOCH)3. Density—(calculated) 3.85, (Berman balance) 3.77. By taking into consideration the symmetry of special positions all space groups except D37R32 and C3v5R3m can be excluded. A structure has been found in the latter group which yields excellent agreement of calculated and observed intensities.

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