Atomic and Molecular Mass in Cement Chemistry

The following are the basis for stoichiometric calculations in cement chemistry, and are used to derive the data in the Minerals Table. Although the values are not derived from any particular source, they will be found to be in line with the IUPAC 2014 ascribed values. The error values are the 1-SD confidence limits in an assumed Gaussian distribution, except where given in bold, in which case they are the half-width of a rectangular distribution. The valency implied by the oxide formula is that which is normally expected in Portland clinker. The value of molecular mass given is, for the purposes of this work, a pure number (and not a physical quantity), and thus has no error. Where errors need to be derived - for example, in order to define the precision of "Bogue"-type calculations - be aware that, because of geochemical co-variance, this is not a straightforward process, and must be tailored to the nature of the raw materials used on an ad hoc basis. Densities (kg/m³ corrected to 20°C) are generally x-ray values, and real-world values may deviate from these in unpredictable ways. The hardness values are the un-corrected Moh's Scale. In the last column, the mineral name of the oxide is given where appropriate. In many instances - for instance, the alkali oxides - the compounds do not exist in isolation. It's easy to paste this table into Excel® if desired.

Atomic and Molecular Masses