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Abstract
The structure of hemimorphite, Zn4Si2O7(OH)2 · H2O has been redetermined with three-dimensional data obtained both photographically and with a counter-diffractometer. R values of 7.1% and 4.0% were obtained for the two sets of data. There are no significant differences between the Si–O bond lengths (mean 1.627 Å) and the Si–O–Si angle is 150°. The Zn–O bonds (mean length 1.954Å) show considerable covalent character. Following Zoltai, the structure is described as a three-dimensional framework of tetrahedra. The water molecule shows large thermal vibrations and may be partly disordered.
Published Online: 2010-07-28
Published in Print: 1967-06
