Structure and atomic coordinates

The EPA may be moving away from the position that the constituents of ceramic materials and other statutory mixtures do not need to be on the Inventory. In a 2008 letter from the EPA to the American Chemistry Council, the EPA took the position that chemicals created during the formation of ceramic materials must be listed on the Inventory. 113 The EPA gave the specific example of ceramic-like materials that are made using relatively precise stoichiometric and compositional control, and result in products with definite elemental ratios, and unit cell structure and atomic coordination sites. These ceramic-like materials should be given chemical names rather than use the broader term ceramics. ... 

A similar set of molecular constants (moments of inertia, molecular structure, and atomic coordinates) as presented in [2] was previously derived by the same group of workers from a smaller number of rotational microwave transitions (a-type transitions only) [3]. 

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