The crystal structure of synthetic mooihoekite Cu9Fe9S16
Abstract
<h2>Acta Crystallographica Section B</h2><h3>Structural Crystallography and Crystal Chemistry</h3><h3>0567-7408</h3> <h2>research papers</h2> Volume 29 Part 11 Pages 2365-2372 November 1973 <h2>The crystal structure of synthetic mooihoekite Cu 9 Fe 9 S 16 </h2> S. R. Hall and J. F. Rowland 2365 Acta Cryst. (1973). B29, 2365 The Crystal Structure of Synthetic Mooihoekite, Cu9Fe9S16* By S. R. HALL AND J. F. ROWLAND Mines Branch, Department of Energy, Mines and Resources, 555 Booth Street, Ottawa, Ontario, Canada K 1A OG 1 (Received 25 April 1973; accepted 8 June 1973) Mooihoekite, Cu9Fe9816, is a recently characterized mineral that is closely related to chalcopyrite, CuFeS2, talnakhite, Cu9FesS~6, and haycockite, Cu4FesSs. A synthetic mooihoekite crystal was used in a three-dimensional X-ray structure analysis. The crystal cell is tetragonal, P-42m, with a= 10.585 (5), c= 5"383 (5) A, Z= 1 and Dx = 4.37. The super-lattice nature of the structure required that special at- tention be given to low-intensity reflexions. Three sets of intensity data were collected on a 4-circle diffractometer. The presence of twinning [twin plane {201 }] required that separate data be collected for the four additional twin-components. Absorption corrections were applied. The structure is a sphalerite- like arrangement of metal and sulphur atoms