X2.8 C3A Correction—The intensity of the (113) peak of
orthorhombic C3A must be corrected for any contribution from
the (023) peak of cubic C3A. This (023) intensity contribution
is calculated by multiplying the (213) peak by a correction
factor, which is the intensity ratio of the (023) peak to the (213)
peak for cubic C3A using Sample A (which contains no
orthorhombic C3A).
X2.9 Intensity Measurement—Integrated intensity above
the background must be measured for each peak. There are a
number of procedures for measuring integrated intensity, and
no specific procedure is required for this standardization.
X2.10 Standardization Curve—Once the standardization
mixtures have been analyzed, standardization curves relating
the measured intensity of each peak, relative to the intensity of
the internal standard peak, to the known proportion of the