Aluminum chalcogenide halides

Analogous sulfur, selenium, and tellurium compounds are easily prepared by reaction of the aluminum halides with the appropriate aluminum chalcogenide (equation 35). 

The compounds AlYX are best prepared by direct reaction between the respective aluminum halide and chalcogenide in a sealed ampoule at 350°C. The reaction is complete after 2 weeks. In the case of the iodides, a mixture of A1 and I2 (molar ratio 3 10) is used instead of AII3. Other preparative methods, such as the reaction of an aluminum halide with Zn or Cd chalcogenide, or with the chalcogen itself, are applicable to the bromide and chloride only, and give poor yields (15-20%) (158, 159, 266, 327, 328). 

Scotford DM (1975) A test of aluminum in quartz as a geothermometer. Am Mineral 60 139-142 Scott HG (1975) Phase relationship in the zirconia-yttria system. J Mater Sci 10 1827-1835 Seifert F, Czank M, Simons B, Schmahl W (1987) A conunensurate-inconunensurate phase transition in iron-bearing ermanites. Phys Chem Minerals 14 26-35 Shannon RD (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr A32 751-767... 

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