Difference between revisions of "11BM Calibration Sample: Lattice & Atomic Position Values"
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Revision as of 20:50, 1 December 2011
Calibration of the wavelength at 11-BM is performed using a mixture of NIST standard reference materials (SRMs). As of 2011, the calibration sample is a mixture of ~ 70 wt% Si (SRM 640c) and ~ 30 wt% Al2O3 (SRM 676).
Lattice & Atomic Position Values are as follows:
Si (SRM 640c) lattice a =
atom x y z Si
Wt. Frac.: 0.29019
a x y z Si 0.125000 0.125000 0.125000
Wt. Frac.: 0.70981
a b c 4.759728 4.759728 12.993473
x y z Al 0.000000 0.000000 0.352011 O 0.306702 0.000000 0.250000
